InterviewSolution
Saved Bookmarks
| 1. |
Find the rate of change of the area of a circular disc with respect to its circumference when the radius is 3 cm. |
|
Answer» As we know that area of a circular disc = πr2 and circumference of a circular disc = 2πr Here r = radius of circular disc To find dA/dC here A = area of circular disc and c = circumference of the circular disk. dA/dC = (dA/dr) x (dr/dC) dA/dr = 2πr dC/dr = 2π dA/dC = 2πr/2π = r (dA/dr)at x = 3 = 3cm |
|