Question

A wall is 8 cm long , 4 cm high and 22.5 cm thick . How many bricks of length 25 cm , breadth 12.5am and 8 cm high are needed to build the wall ?

Answer 1

Answer:

Step-by-step explanation:

Dimensions of wall:-

Length-8m

Breadth-4m

Height-22.5cm=0.225m

Volume of the wall= l*b*h=8*4*0.225

                                         = 7.2m^3        =  7200000cm^3

Dimensions of bricks=

Length-25cm

Breadth-12.5cm

Height-8cm

Volume of bricks=l*b*h=25*12.5*8

                                      =2500cm^3

No of bricks req.=Vol. of wall/Vol. of brick

                            = 7200000/2500

                            =  2880