Practicing Success
Practicing Success
CUET Preparation Today
| The length x of a rectangle is increasing at the rate of 3 cm/minute and the width y is increasing at the rate of 6 cm/minute. When x =5 cm and y = 5 cm, find the ratio of rates of change of area to that of the perimeter with respect to time. |
2:5 2:3 3:2 5:2 |
| 5:2 |
| dA/dt = x(dy/dt)+y(dx/dt) dP/dt = 2(dx/dt +dy/dt) |
