How many bricks each 25cm long, 10cm wide and 7.5cm thick, will be recuired for a wall 15m long 2.5m high and 1.25m thick.
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Brick:
= 2(25 x 10+10 x 7.5+7.5 x 25)
= 2(250+75+187.5)
= 2(512.5)
= 1025 cm^2
Wall:
= 2(15 x 2.5+2.5 x 1.25+1.25 x 15)
= 2(37.5+3.75+16.25)
= 2(57.5)
= 115 m^2 = 11500 cm^2
No.of Bricks:
= Wall / Brick
= 11500 / 1025
= 92 Bricks
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