Subject: General Aptitude · Chapter: Volume and Surface Area · Exam: 2010 · Marks: · Difficulty:
Find the number of bricks, each measuring 24 cm × 12 cm × 8 cm, required to construct a wall 24 m long, 8m high and 60 cm thick, if 10% of the wall is filled with mortar?
Answer
Answer (as printed):
Explanation
Volume of the wall = (2400 × 800 × 60) cu. cm. Volume of bricks = 90% of the volume of the wall 90 = × 2400 × 800 × 60 cu. cm. 100 Volume of 1 brick = (24 × 12 × 8) cu. cm. 90 2400 × 800 × 60 ∴ Number of bricks = × = 45000. 100 24 × 12 × 8
Explanation as extracted from the printed page; notation may be imperfect.