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