The height of a cone is 15 cm. If its volume is 1570 cm2 , find the radius of the base. (Use π = 3.14)

Solution:

Given height of a cone, h = 15 cm

Volume of the cone = 1570 cm³

(1/3)r²h = 1570

(1/3)3.14 ×r²×15 = 1570

5 ×3.14×r² = 1570

r² = 1570/5×3.14 = 314/3.14 = 100

r = 10

Hence the radius of the cone is 10 cm.