Question

total number of bricks used​

Answer 1

Answer:

volume of wall = 18 x 0.5 x 9 = 81 m³

volume of each brick in m³ = 0.2 x 0.15 x 0.1 = 0.003 m³

volume used by motor = 1/10 x 81 = 8.1 cm³

so the volume left for bricks = 81 - 8.1 = 72.9 cm³

number of bricks required = 72.9/0.003

72.9 x 1000/ 3 = 72900/3 = 24300

so the correct option is c i.e. 24300

hope this will help you