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Recent questions tagged ch6
Questions
A ladder 5 m long is leaning against a wall. The bottom of the ladder is pulled along the ground, away from the wall, at the rate of 2cm/s. How fast is its height on the wall decreasing when the foot of the ladder is 4 m away from the wall ?
cbse
class12
bookproblem
ch6
sec1
q10
p198
sec-b
medium
math
asked
Nov 23, 2012
by
thanvigandhi_1
1
answer
A balloon, which always remains spherical has a variable radius. Find the rate at which its volume is increasing with the radius when the later is $10\; cm$.
cbse
class12
bookproblem
ch6
sec1
q9
p198
sec-a
easy
math
asked
Nov 22, 2012
by
thanvigandhi_1
1
answer
A balloon, which always remains spherical on inflation, is being inflated by pumping in $900$ cubic centimetres of gas per second. Find the rate at which the radius of the balloon increases when the radius is $15\; cm$.
cbse
class12
bookproblem
ch6
sec1
q8
p198
sec-a
easy
math
asked
Nov 22, 2012
by
thanvigandhi_1
1
answer
The length $x$ of a rectangle is decreasing at the rate of $5\; cm/minute$ and the width y is increasing at the rate of $4\; cm/minute$. When $x = 8$ cm and $y = 6$ cm, find the rates of change of (a) the perimeter
cbse
class12
bookproblem
ch6
sec1
q7
q7-a
p198
sec-a
easy
math
asked
Nov 22, 2012
by
thanvigandhi_1
1
answer
The radius of a circle is increasing at the rate of $0.7\; cm/s$. What is the rate of increase of its circumference?
cbse
class12
bookproblem
ch6
sec1
q6
p198
sec-a
easy
math
asked
Nov 22, 2012
by
thanvigandhi_1
1
answer
A stone is dropped into a quiet lake and waves move in circles at the speed of $5 \;cm/s$. At the instant when the radius of the circular wave is $8 \;cm$, how fast is the enclosed area increasing?
cbse
class12
bookproblem
ch6
sec1
q5
p197
sec-a
easy
math
asked
Nov 22, 2012
by
thanvigandhi_1
1
answer
An edge of a variable cube is increasing at the rate of $3\; cm/s$. How fast is the volume of the cube increasing when the edge is $10\; cm$ long?
cbse
class12
bookproblem
ch6
sec1
q4
p197
sec-a
easy
math
asked
Nov 22, 2012
by
thanvigandhi_1
1
answer
The radius of a circle is increasing uniformly at the rate of $3\; cm/s.$ Find the rate at which the area of the circle is increasing when the radius is $10\; cm$.
cbse
class12
bookproblem
ch6
sec1
q3
p197
sec-a
easy
math
asked
Nov 22, 2012
by
thanvigandhi_1
1
answer
The volume of a cube is increasing at the rate of $ 8\;cm^ 3/s$ . How fast is the volume of a cube is increasing at the rate of $8\;cm^ 3 /s$ . How fast is the surface area increasing when the length of an edge is $12 cm$?
cbse
class12
bookproblem
ch6
sec1
q2
p197
sec-a
easy
math
asked
Nov 16, 2012
by
kasturi.c
1
answer
Find the rate of change of the area of a circle with respect to its radius r when $(a)\; r = 3 cm$
cbse
class12
bookproblem
ch6
sec1
q1
q1-a
p197
sec-a
easy
math
asked
Nov 16, 2012
by
kasturi.c
1
answer
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