Question

1. A brick measures 30 cm x 10 cm x 7.5 cm. How
many bricks will be required for a wall 30 m long. 2m
high and 3 upon 4 metre thick?​

Answer 1

Answer:

Volume of wall = l*b*h = 30*2*0.75 m³

volume of one brick = 0.3*0.1*0.075 m³

Number of bricks = volume of wall / volume of one brick

No. of bricks = 30*2*0.75/0.3*0.1*0.075 = 20000 (Ans)

(Mark as brainlist)