Question

find the number of bricks,each measuring 25cm×12.5cm×7.5cm,required to construct a wall 24m long ,20m high and 0.5m thick.while the cement and sand mixtures occupies 1/20 of the volume of the wall

Answer 1

Bricks                                    Wall

l=25 cm                                l=6 m =600 cm

b=12.5 cm                            b=50 cm

h=7.5 cm                              h=5 m =500 cm

volume of wall=l x b x h

                       =600 x 50 x 500

                       =15000000 cubic cm

volume of mixture =1/20 x 15000000

                              =750000 cubic cm

volume left =15000000 - 750000

                   =14250000 cubic cm

required brick =14250000/25 x 12.5 x 7.5

                        =6080 bricks

Read more on Brainly.in - https://brainly.in/question/2333984#readmore

Answer 2

Answer:

Step-by-step explanation:

volume of wall=500×600×5=15000000 volume of mixture=15000000×1/20=750000 left wall volume =15000000_750000=14250000 required brick=14250000/25×12.5×7

5=6080