Recent questions tagged ch-8

A cylinder container with diameter $48\;cm$ contains sufficient water to submerge a rectangular soild of iron with dimensions $33 \;cm \times 18\;cm \times 12\;cm$ . Find the rise in the level of water when solid is completely submerged.

asked Jun 12, 2015 by meena.p

1 answer

A hall of is of length $16\;cm$ , breadth $14\;m$ and height $5\;m$ calculate the number of person that can be accommodated in the hall, assuming $3.5\;m^3$ of air is required for each person.

asked Jun 12, 2015 by meena.p

1 answer

A rectangular tank can hold $650$ liters of milk , if it is $130\;cm$ long and $ 250\;cm$ wide, find the height of the tank.

asked Jun 12, 2015 by meena.p

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Find the surface area of a chalk box whose length , breadth and height are $16\;cm,8\;cm$ and $6\;cm$ respectively

asked Jun 12, 2015 by meena.p

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Find the volume of a cylinder which $18\;cm$ in height and radius $10.5 \;cm$

asked Jun 12, 2015 by meena.p

1 answer

How many bricks will be required for a wall which is $8\;cm$ long $6\;cm$ high and $22.5\;cm$thick if each brick measures $25 \;cm \times 11.25\;cm \times 6\;cm$

asked Jun 12, 2015 by meena.p

1 answer

Find the volume of a cube whose total surface area is $486\;cm^2$

asked Jun 8, 2015 by meena.p

1 answer

Find the volume, the total surface area and the lateral surface of a cubord, which is $8\;m$ long, $6\;m$ broad and $3.5 \;m$ high.

asked Jun 8, 2015 by meena.p

1 answer

The area of trapezium is $352\;cm^2$ . The distance between the parallel sides is $16\;cm$ If one of the parallel sides is $25\;cm$ . Find the other .

asked Jun 8, 2015 by meena.p

1 answer

Find the area of a trapezium whose parallel sides are $57\;cm$ and $39\;cm$ and the distance between them is $28\;cm$

asked Jun 8, 2015 by meena.p

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Find the area of rhombus in which each side is equal to $15\;cm$ and one of whose diagonals is $24 \;cm$

asked Jun 8, 2015 by meena.p

1 answer

Find the area of a rhombus the length of whose diagonals are $36\;cm$ and $22.5 \;cm$

asked Jun 8, 2015 by meena.p

1 answer

The diagonal of a quadrilateral is $30\;m$ in length and the length of the perpendiculars to it from the opposite vertices are $6.8\;m$ and $9.6\;m$ . Find the area of the quadrilateral

asked Jun 8, 2015 by meena.p

1 answer

The modal class for the following frequency distribution is ________

asked Nov 10, 2014 by meena.p

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The median class for the following distribution is _______

asked Nov 10, 2014 by meena.p

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The class marks of classes $15-35$ and $20-40$ is________

asked Nov 10, 2014 by meena.p

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The mean of the following data is $20.6$ , then the value of p is _________

asked Nov 10, 2014 by meena.p

1 answer

If the mean of the following distribution is $2.6$ , then the value of k is

asked Nov 10, 2014 by meena.p

1 answer

The mode and mean are $26.6 $ and $ 28.1$ respectively in a distribution then its median is _______

asked Nov 10, 2014 by meena.p

1 answer

The times in seconds taken by $150$ athletes to run $110 \;m$ hurdle race an given below . The no.of athletes whose completed the race in less than $14.6$ seconds is __________

asked Nov 10, 2014 by meena.p

1 answer

If $x_i$'s are the midpoints of the class intervals of grouped data, $f_i$'s are the corresponding frequencies and I is the mean, then $ \sum (f_i x_i - \bar {x} )$ is equals to ______

asked Nov 10, 2014 by meena.p

1 answer

Two dice are thrown simultaneously. The probability of getting six as product is _________

asked Nov 7, 2014 by meena.p

1 answer

A box of 600 electric bulks contains 12 defective bulks. One bulls is taken out at random from this box. Then the probability that it is a non- defective bulb is ______

asked Nov 7, 2014 by meena.p

0 answers

One card is drawn from a well shiffled deck of 52 cards. Then the probability of drawing 10 of a black suit is _____

asked Nov 7, 2014 by meena.p

1 answer

The probability that a leap year selected at random, will contain 53 sundays is _______

asked Nov 7, 2014 by meena.p

1 answer

Two dice are thrown simultaneously. The probability o getting six as the product is ________

asked Nov 7, 2014 by meena.p

1 answer

On throwing two cubical dice simultaneously, the probability that the sum of the digits on the top faces of the two dice is greater than 7 or less than 7 is

asked Nov 7, 2014 by meena.p

1 answer

The probability of getting a sum greater than 15 on throwing 3 dice is ______

asked Nov 7, 2014 by meena.p

1 answer

When three coins are tossed simultaneously, the probability of getting at least one tail is _______

asked Nov 7, 2014 by meena.p

1 answer

The mean weight of 8 numbers is 15. If each number is multiplied by 2, the new mean is _____

asked Nov 6, 2014 by meena.p

1 answer

The mean of 11 number is 35. If the mean of first 6 number is 32 and that of last 6 number is 37, the sixth number is ______

asked Nov 6, 2014 by meena.p

1 answer

The mean of 5 numbers is 18. If one number is excluded their mean is 16. The excluded number is ________

asked Nov 6, 2014 by meena.p

1 answer

The mean of marks scored by 100 students was found to be 40, Later on it was discovered that a score of 53 was misread as $83$. The correct mean is ______

asked Nov 6, 2014 by meena.p

1 answer

The mean of 5 numbers is 18. If one number is excluded , their mean is $16^{\circ}$. then the excluded number is ________

asked Nov 6, 2014 by meena.p

1 answer

The mode of a frequency distribution can be determined graphically from

asked Nov 6, 2014 by meena.p

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The median of a given frequency distribution is found graphically with the help of

asked Nov 6, 2014 by meena.p

1 answer

The mean of a discrete frequency distribution $\large\frac{x}{f_i} $$; i=1,2,3,.n$ is given by

asked Nov 6, 2014 by meena.p

1 answer

If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 -a, x_2 - a, ....... x_n - a$ is _________

asked Nov 6, 2014 by meena.p

1 answer

If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 +a, x_2 +a, ....... x_n +a$ is _________

asked Nov 6, 2014 by meena.p

1 answer

If $\bar {x} $ is the mean of ten natural numbers $x_1,x_2,x_3......x_{10}$ , then $(x_1 - \bar {x}) +(x_2 - \bar {x})+ ..... (x_{10} - \bar {x} )$ is _______

asked Nov 6, 2014 by meena.p

1 answer

If the numerator of a fraction is multiplied by 2 and its denominator is increased by 2, it becomes $\large\frac{6}{7}$. If instead we multiply by 2 and increase the numerator by 2, it reduces to $\large\frac{1}{2}$ , the fraction is :

asked Nov 6, 2014 by meena.p

1 answer

The ratio of two numbers is $4:1$ . If 5 is added to both the number obtained becomes $3:1$ The numbers are :

asked Nov 6, 2014 by meena.p

1 answer

The denominator of a fraction is 4 more than twice the numerator. When both the numerator and denominator are decreased by 6, then the denominator becomes 12 times the numerator. Then the fraction is

asked Nov 6, 2014 by meena.p

1 answer

The sum of the numerator and denominator of a fraction is 3 less than twice the denominator . If the numerator and denominator are decreased by 1, the numerator becomes half the denominator. Then the faction is

asked Nov 6, 2014 by meena.p

1 answer

If we add 1 to the numerator of a fraction, it reduces to $\large\frac{1}{2}$ . If we subtract 1 from its denominator it reduces to $\large\frac{1}{3}$ . Thus the fraction is _____

asked Nov 6, 2014 by meena.p

1 answer

The given system of equation $=3x+4y =5; \large\frac{9}{2} $$x -6y=\large\frac{15}{2}$has :

asked Nov 5, 2014 by meena.p

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A system is said to be inconsistent if _______

asked Nov 5, 2014 by meena.p

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The following system of the equation represents ______ lines . $3x-4y=-7;3x-4y=-9$

asked Nov 5, 2014 by meena.p

1 answer

The value of 'k' for which the system $x+2y=13;(k-1)x+(k+1)y=k+2$ has no solutions is

asked Nov 5, 2014 by meena.p

1 answer

The value of 'k' for which the system $kx+2y-1=0;5x-3y+2=0$ has no solutions is

asked Nov 5, 2014 by meena.p

1 answer

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