The length x of a rectangle is decreasing at the rate of 5 cm/min and the width y is increasing at the rate of 4 cm/min. When x = 8 cm and y = 6 cm, find the rates of change of
the area of the rectangle

The length x of a rectangle is decreasing at the rate of 5 cm/min and the width y is increasing at the rate of 4 cm/min. When x = 8 cm and y = 6 cm, find the rates of change of the perimeter

The length of a rectangle is decreasing at the rate of 3cm/minute and the width is increasing at the rate of 2cm/minute. When x=10cm and y=6cm , find the rate of change of (i) the perimeter (ii) the area of the rectangle.

If the sides of square are decreasing at the rate of 1.5 cm/s, at what rate is its perimeter decreasing?

The side of a square is increasing at the rate of 0.01 cm per sec. Find the rate of change of its area at the instant when each side is 4 cms.

At a certain instant the volume of a sphere increses at the rate of 36 cm^3//sec and its surface area increases at the rate of 12 cm^2//sec . find the rate of change of its radius at that instant.

The radius of a sphere is decreasing at the rate of 3 cm per second. Obtain the rate of decrease of the surface area when the radius is 18 cm.

if the sides of an equilateral triangle are increasing at the rate of 2 cm/s, at what rate is its area increasing, when its side is 10 cm?

The length and breadth of a rectangle are 12 cm and 4 cm. respectively. Find the perimeter and area of the rectangle.

The breadth of a rectangle is 5 cm. and its area is 100 m^2 . Find the length of the rectangle.