Recent questions tagged class10

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

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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

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In the line $y= mx+c$ m represents the ______ of the line

asked Nov 5, 2014 by meena.p

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The line $\large\frac{x}{a} +\frac{y}{b} $$=1$ touches _________

asked Nov 5, 2014 by meena.p

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On walking x meters towards a chiming in a horizontal line through its base, the elevation of its top changes from $30^{\circ}$ to $60^{\circ}$ . The height of the chimney is _________

asked Nov 5, 2014 by meena.p

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If the angles of elevation of the top of a tower from two points at a distance of $4\;m$ and $9\;cm$ from the base of the tower and in the same straight line with it are complementary. The height of the tower is ______

asked Nov 5, 2014 by meena.p

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The angle of elevation of the sun , when the length of the shadow of a verticle pole is equal to its height is _____

asked Nov 5, 2014 by meena.p

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The height of a tower is $10 \;m$ . Find the length of its shadow when sum's attitude makes an angle of $45^{\circ}$ the horizontal

asked Nov 5, 2014 by meena.p

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The height of the mountain if the elevation of its top at an unknown distance from the base is $30^{\circ}$ and at a distance $10\;km$ further off from the mountain along the same line whose where angle of elevation is $15^{\circ}$ is _____ $(\tan 15^{\circ} = 0.27)$

asked Nov 5, 2014 by meena.p

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The shadow of a vertical tower on level ground increases by $10\;cm$ The attitude of sun changes from the angle of elevation $45 ^{\circ}$ to $30^{circ}$ The height of the tower is _______

asked Nov 5, 2014 by meena.p

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At a point on level ground, the angle of elevation of a vertical tower is found to be such that its tangent is $ \large\frac{5}{12}$ . On walking $192\;m$ towards the tower. the tangent of the angle of elevation is $\large\frac{3}{4}$. The height of the tower is

asked Nov 5, 2014 by meena.p

1 answer

The angle of elevation of a jet plane from a point A on the ground is $60^{\circ}$ After a flight of $30$ seconds , the angle of elevation changes to $30^{\circ}$. If the jet plane is flying at a constant height of $3600\sqrt 3\;m$, then the speeds of the jet plane is _______

asked Nov 5, 2014 by meena.p

1 answer

The angles of depression of two ships from the tops of a light house are $45^{\circ}$ and $30^{\circ}$ towards east. If the ships are $100\;m$ apart, the height of the light house is _______

asked Nov 5, 2014 by meena.p

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The angle of elevation of a cloud from a point h meter above a lake is $\theta $. The angle of of depression of the lake is $45^{\circ}4. The height of the cloud is

asked Nov 5, 2014 by meena.p

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If $x^a=c^b$ and $x^c=c^a$ then $a^2=$_

asked Nov 5, 2014 by sreemathi.v

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The captain of an aeroplane who is flying at an alttitude of $1200\;m$ sights two ships at an angle of depression of $60^{\circ}$ and $30^{\circ}$. The distance between the two ships is ________

asked Nov 5, 2014 by meena.p

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If $\big(\large\frac{a}{b}\big)^{x-1}=\big(\large\frac{b}{a}\big)^{x-3}$,then the value of $x$ is _____

asked Nov 5, 2014 by sreemathi.v

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From the top of a $50\;m$ high building , the angle of depression of a car on the road is $30^{\circ}$. The distance between the car and the building is ________

asked Nov 5, 2014 by meena.p

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If $x=2^{2n}$,then the value of $8.x^{\Large\frac{3}{2n}}-8.x^{-\Large\frac{3}{2n}}$ is __

asked Nov 5, 2014 by sreemathi.v

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The value of $2\sqrt[3]{40}+3\sqrt[3]{625}-4\sqrt[3]{320}$ is _

asked Nov 5, 2014 by sreemathi.v

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The rational form of $18.\overline{48}$ is ____

asked Nov 5, 2014 by sreemathi.v

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$0$ is a ________ number

asked Nov 5, 2014 by sreemathi.v

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The rational form of $0.37\overline{81}$ is _____

asked Nov 5, 2014 by sreemathi.v

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If $\large\frac{5+2\sqrt 3}{7+4\sqrt 3}$$=a+b\sqrt 3$ then the value of $a$ and $b$ is

asked Nov 5, 2014 by sreemathi.v

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If $x=\frac {\sqrt3 + 1}{2}$ then the value of $4x^3+2x^2-8x+7$

asked Nov 5, 2014 by sreemathi.v

1 answer