Question
Find the number of bricks, each measuring 24 cm x 12 cm x 8 cm, required
to construct a wall 24 m long, 8m high and 60 cm thick, if 10% of the
wall is filled with mortar?
Find the number of bricks, each measuring 24 cm x 12 cm x 8 cm, required
to construct a wall 24 m long, 8m high and 60 cm thick, if 10% of the
wall is filled with mortar?
Answer: Option B
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Volume of the wall = (2400 x 800 x 60) cm3
Volume of bricks = 90% of the volume of the wall
= ((90/100)*2400 *800 * 60)cm3
Volume of 1 brick = (24 x 12 x 8) cm3
Number of bricks=(90/100)*(2400*800*60)/(24*12*8) = 45000.
.
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