How many bricks each 25 cm long and 12cm board will be needed to save a coat 30 long and 20 metre
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area of brick=(25×12)cm sq.
=300cm sq.=3m sq.
Area of coat=(30×20)m sq.
=600m sq.
bricks needed=area of coat/area of each brick
=600m sq./3m sq.
=200 bricks
=300cm sq.=3m sq.
Area of coat=(30×20)m sq.
=600m sq.
bricks needed=area of coat/area of each brick
=600m sq./3m sq.
=200 bricks
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