a cylindrical bucket of height 36 cm and radius 21 cm is filled with sand . the bucket is emptied on the ground and a conical heap of sand is formed , the height of the heap being 12 cm . the radius of the heap at the base is :
import math
n0 = 36.0
n1 = 21.0
n2 = 12.0
t0 = n1 * n1
t1 = n0 * t0
t2 = t1 / 4.0
answer = math.sqrt(max(0, t2))
print(answer)