Question

how many bricks of size 21 cm into 10 cm into 5 cm are needed to build a wall 15 metre long 7 metre height and 80cm thick if the bricks are sold at rupees 800 per thousand what will be the cost of the bricks required to build a wall ​

Answer 1

Answer:

80,000 bricks

Step-by-step explanation:

Volume = l × b × h

Volume of wall = 15 m × 7 m × 80 cm

                          =1500 cm × 700 cm × 80 cm

                         =84000000 cm = 84 × $10^{6}$

Volume of a brick = 21 cm × 10 cm × 5 cm

                              =1050 cm

Number of bricks required =  84 × $10^{6}$  ÷ 1050

                                             = 80,000 bricks