Question

2)
A brick is 22.5 cm long, 10 cm thick and 5 cm high. Find the
space occupied by 7500 bricks
.​

Answer 1

Step-by-step explanation:

Total volume of a wall (V) = (600×500×50)cm^3……………….(1)

Volume of the mortar =5% of V = V/20 cm^3.

Thus , volume of the bricks = V - V/20 = (19/20).V cm^3.

Number of the bricks = volume of the bricks/volume of a brick.

= (19/20).V/(25×12.5×7.5). , putting V= 600×500×50 from eqn. (1).

= (19/20).(600×500×50)/(25×12.5×7.5).

= (19×600×500×50×100)/(20×25×125×75).

= (19×8×50×100)/(125).

=(19×8×10×4).

= 6080 bricks. Answer