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A wall 15m long, 30cm wide …

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A wall 15m long, 30cm wide and 4m high is made of bricks, each measuring 22cm ×12.5cm ×7.5cm . If 1÷12 of the total volume of the wall consists of mortar, how many bricks are there in the wall?

Posted by Sk Rana 6 years ago

CBSE > Class 08 > Mathematics

1 answers

Gaurav Seth 6 years ago

l= 15 m

b = 30 cm = 0.3 m

h= 4 m

volume = l×b×h

15×0.3×4

18 m^3

mortar

Volume= 1/12 of the total volume of the wall

1×18/12

1.5 m^3

Brick

Volume of bricks = Volume of wall- Volume of Mortar

18-1.5

16.5 m^3

Volume of 1 brick = l×b×h

0.22×0.125 × 0.075

0.0020625 m^3

No. of bricks in the wall= Vol. of bricks / Vol. of each brick

16.5/0.0020625

Ans = 8000 bricks.

0Thank You

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