Beads are dropped to create a conical pile such that the ratio of its radius to the height of the pile is constant at 2:3 and the volume is increasing at a rate of 5 cm3/s. Find the rate of change of height at h = 15cm.


A.

0. 0106 cm/s

B.

0. 0159 cm/s

C.

0. 1592 cm/s

D.

0. 5305 cm/s