The length of a rectangle is increasing at the rate 3.5 cm/sec. and its breadth is decreasing at the rate of 3 cm/sec. Find the rate of change of the area of the rectangle when length is 12 cm and breadth is 8 cm.

The length of a rectangle is increasing at the rate of 3.5 cm/sec and its breadth is decreasing at the rate of 3cm/sec. Find the rate of change of the area of the rectangle when length is 12 cm and breadth is 8 cm.

The length x of a rectangle is increasing at the rate of 3 m/sec and the width y is increasing at the rate of 2 m/sec. Find the rate of change of its area when x=10 cm and y=6 cm.

The length 'x' of a rectangle is decreasing at the rate of 2cm//s and the width 'y' is increasing at the rate of 2cm//s . Find the rate of change of perimeter.

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

The length of a rectangle is decreasing at a rate of 3 cm/sec and breadth is increasing at a rate of 4 cm/sec. Find the rate of change of its (a) perimeter (b) area, when the length and breadth of rectangle are 7 cm and 8 cm respectively.

The length of a rectangle is decreasing at a rate of 3 cm/sec and breadth is increasing at a rate of 4 cm/sec. Find the rate of change of its (a) perimeter (b) area, when the length and breadth of rectangle are 7 cm and 8 cm respectively.

Find the ara of a rectangle of length 12 cm and breadth 8.5 cm.

The length x of a rectangle is increasing at the rate of 3 cm/sec. and the width y is increasing at the rate of 2 cm/sec. If x=10 cm and y=6 cm, then the rate of change of its area is