Question

A wall 24 m long, 0.4 m thick and 6 m high is constructed with the bricks each of dimensions 25 cm x 16 cm x 10 cm.

Answer 1

let the length, breadth and height of wall be L, B and H.

let the length, breadth and height of the brick be l, b and h.

L=24m

B=0.4m

H=6m

l=25 cm=0.25m

b=16cm=0.16m

h=10cm=0.10m

volume of the wall=LBH

                              =24*0.4*6

                              =57.6 cubic m

volume of the brick=lbh

                                =0.25*0.16*0.10

                                =0.004 cubic m

no. bricks needed to make the wall=(volume of the wall)/(volume of 1 brick)

                                                          =57.6/0.004

                                                          =14400

therefore, 14400 bricks are needed to make the wall.