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Question

A wall 24 m long, 0.4 m thick and 6 m high is constructed with the bricks each of dimensions 25 cm × 16 cm × 10 cm. If the mortar occupies 110 th of the volume of the wall, and n is the number of bricks used in constructing the wall then n10 is

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Solution

Volume of wall =(2400)(40)(600)=57600000cm3
Volume of brick =25(16)10=4000cm3
110 of wall =5760000010=5760000
Remaining wall =576000005760000=51840000
Number of brick n=518400004000=12960

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