CUET Preparation Today
| The length x of a rectangle is decreasing at the rate of 4 cm/minute and the width y is decreasing at the rate of 4 cm/minute. When x =2 cm and y = 2 cm, which of the following statements hold true? |
The perimeter of the rectangle decreases at the rate of 16 cm/min. The perimeter of the rectangle increases at the rate of 10 cm/min The perimeter of the rectangle changes at the rate of 0 cm/min none of these |
| The perimeter of the rectangle decreases at the rate of 16 cm/min. |
| dP/dt = 2(dx/dt +dy/dt) |
