Question

A wall 4 metre long, 3 metre high and 13 cm thick is made up of bricks each measuring $20cm\times 12cm\times 6.5cm.$ The number of bricks required is

• A. 500
• B. 1000
• C. 1500
• D. 2000

Answer 1

Answer: (B)

1000

Let there be $n$ bricks required. Then,
Volume of wall $=n$ (volume of a brick)
$400\times 300\times 13=n(20\times 12\times 6.5)$
$\therefore n=1000$ bricks