Question

How many bricks of 20 cm long should be put in a line to build a 40 m long wall ?

• A. 20
• B. 800
• C. 2
• D. 200

Answer 1

The correct option is D 200

We know, 100 cm = 1 m
So, 40 m = 4000 cm
Here, a brick is 20 cm long.
So, in 40 m or 4000 cm long wall, the number of bricks we can fit
= 4000/20 bricks
= 200 bricks
$\therefore$ 200 bricks should be put in a line to build 40 metre long wall.