A stone is dropped into a quiet lake and...

A stone is dropped into a quiet lake and waves move in circles at a speed of 4cm/sec. At the instant when the radius of the circula wave is 10cm, how fast is the enclosed area increaseing?

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A stone is dropped into a quiet lake and waves moves in circles at a speed of 4 cm/sec. At the instant when the radius of the circular wave is 10 cm, how fast is the enclosed area increasing?

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?

The radius of a circle is increasing at a rate of 2.5 cm/sec. Find the rate of increase of the area of the circle when its radius is 5cm.

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.

If the radius of a circle changes at a uniform rate of 2 cm/s, find the rate of change of area of the circle, at the instant when the radius is 20 cm.

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?

If the rate of increasae of the side of a squre is 1 cm/sec , the rate of increase of the area of the square when its side 2 cm, is

The radius of a circular plante increased at the rate of 0.002 cm/s. How fast is the area changing when radius is 14 cm?

The radius of a circle is increased by 2cm from 5 cm to 7 cm . What is the percentage change in area of the circle ?

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