Dimensions 81957

How many bricks are needed to build a wall that is 12 m long, 1.6 m high, and 47 cm wide if the dimensions of the brick are 30 x 15 x 7.5 cm and 5% of the wall volume is mortar?

Correct answer:

n =  2541

Step-by-step explanation:

a=12 m b=1.6 m c=47 cm m=47:100  m=0.47 m  x=30 cm m=30:100  m=0.3 m y=15 cm m=15:100  m=0.15 m z=7.5 cm m=7.5:100  m=0.075 m  V1=a b c=12 1.6 0.47=1251128=91253=9.024 m3  r=100%5%=11005=0.95 V2=r V1=0.95 9.024=6255358=8625358=8.5728 m3  V3=x y z=0.3 0.15 0.075=8000270.0034 m3  n3=V2/V3=8.5728/0.00342540.0889  n=n3=2540.0889=2541

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