Question

a wall 10m long 5m high and 64 cm thick has to be built . if the dimensions of the brick is 20 cm by 16 cm by 8cm . then how many bricks will be used​

Answer 1

Answer:

→ 12,500 bricks .

Step-by-step explanation:

Case 1 .

→A wall is to be built using bricks of dimensions 20cm × 16cm × 8cm.

Length = 20 cm .

Breadth = 16 cm .

Height = 8 cm .

∵ Volume of brick = LBH .

= ( 20 × 16 × 8 )cm³ .

= 2560 cm³ .

Case 2 .

Volume of wall .

Length = 10 m = 1000 cm .

Breadth = 5 m = 500 cm .

Height = 64 cm .

∵ Volume of wall = LBH .

= ( 1000 × 500 × 64 ) cm³ .

= 32000000 cm³ .

∵ No. of bricks = ( Volume of wall ) / ( Volume of brick )

= 32000000 cm³  / 2560 cm³ .

= 12,500 bricks .

Hence, it is solved .

THANKS .