Question

A wall is to be built using bricks of demensiond 20 cm × 16 cm × 8 cm. How many bricks will be required if the wall is 10 m long, 5m high and 64 cm thick?

Answer 1

10m = 1000cm, 5m = 500cm, 64cm.

Number of bricks = 1000 * 500 * 64/20 * 16 * 8

                              = 12500.

Answer 2

Number of bricks = Volume of wall
                               -----------------------
                                Volume of brick
                          
                            = 10*100*5*100*64
                              ----------------------------
                              20*16*8
                           =12500 m3.