Question

How many bricks will be needed to construct a
wall 4m long, 3m high and 13 cm broad, if each
brick measures 20cm x 12cm x 6.5cm ?​

Answer 1

volume of wall = l ×b×h

volume of wall = 400× 300× 13 = 1560000cm³

volume of 1 brick = 20 × 12× 6.5 cm³

= 1560 cm ³

bricks needed = volume of wall

volume of 1 brick

= 1560000

1560

= 1000 bricks

hope it's help....