A slab of ice 8 inches in length, 11 inches in breadth, and 2 inches thick was melted

A slab of ice 8 inches in length, 11 inches in breadth, and 2 inches thick was melted and re-solidified into the form of a rod of 8 inches diameter. The length of such a rod, in inches, is nearest to

  1. 3
  2. 3.5
  3. 3
  4. 4.5

Answer

In the process of melting and then solidification, the volume remains constant.

Volume of slab of ice (Cuboid) = Volume of rod (Cylinder)

(8 x 11 x 2) = L x π x 42

L = 3.5 inch

The correct option is B.