RRB NTPC · Question 26
A closed wooden rectangular box made of 1 cm thick wood has the following outer dimensions: length 22 cm, breadth 17 cm, and height 12 cm. It is filled with cement. What is the volume of the cement in the box? A. 1488 cu. cm B. 3000 cu. Cm C. 4488 cu. Cm D. 2880 cu. cm
Show answer & explanation
Answer: (D) B
Explanation
The wood is 1 cm thick on every side, so each inner dimension is 2 cm less than the outer one: 20 cm × 15 cm × 10 cm. The cement fills the inside: 20 × 15 × 10 = 3,000 cu. cm.