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Q.

The number of  bricks each measuring 25cm×11.25cm×6cm will be needed to build a wall 8 m long, 6 m height and 22.5 cm thick is

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a

6400

b

6000

c

7200

d

5600

answer is C.

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Detailed Solution

Number of bricks = volume of wall  volume of bricks =800×600×22.525×11.25×6=6400

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