Question

A solid metallic cylinder of base radius 3 cm and height 5 cm is melted to make n solid cones of height 1 cm and base radius 1 mm. The value of n is
A. 450
B. 1350
C. 4500
D. 13500

Answer 1

Correct Answer - D
n = number of cones `= ("volume of the cylinder")/("volume of 1 cone") = (pi xx 3 xx 3 xx 5)/((1)/(3)pi xx (1)/(10) xx (1)/(10) xx 1) = 13500`