Question

How many bricks of length 20 cm will be needed to keep along the foot of a wall of 80 meters long?

Answer 1

To find how many bricks of length $20$ cm will be needed to keep along the foot of a wall of $80$ meters long .

Since $1$ m $=100$ cm

$80$ m $=8000$ cm

Therefore, number of Bricks can be calculated as

$n=\frac{8000}{20}$

$n=400$

Hence, number of Bricks are $400$.