Question

10. How many bricks will be required to construct a wall 10 m long, 4 dm wide and 3 m high, if each brick measures 25 cm x 12 cm x 8 cm?
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Answer 1

Given the wall is of 10m long 4m wide and 3 m high.

Then volume of the wall is 1000×400×300=1200,00,000 cm

And volume of the brick is 25×12×8=2400 cm

Now number of brick required to construct the wall is

2400

1200,00,000

=5,000.