A brick measures 20cm by 10cm by 712cm- How many bricks will be required for a wall 25m long 2m high and 34m thick-

Number of bricks required = Volume of the wall Volume of a brick Volume of wall =25× 2× 3 4 cu.m Volume of one brick #160; = 20 1 ...

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Standard IX

Mathematics

Volume of a cuboid

A brick measu...

Question

A brick measures $20 c m$ by $10 c m$ by $7 \frac{1}{2} c m$ . How many bricks will be required for a wall $25 m$ long $2 m$ high and $\frac{3}{4} m$ thick?

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Solution

Number of bricks required
$= \frac{V o l u m e o f t h e w a l l}{V o l u m e o f a b r i c k}$
Volume of wall $= 25 \times 2 \times \frac{3}{4} c u . m$
Volume of one brick
$= \frac{20}{100} \times \frac{10}{100} \times \frac{15}{200} c u . m .$
$= \frac{3}{2000} c u . m .$
Required number of bricks
$= (25 \times 2 \times \frac{3}{4}) \div \frac{3}{2000}$
$= 25000$

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A brick measures 20cm by 10cm by 712cm. How many bricks will be required for a wall 25m long 2m high and 34m thick?

Number of bricks required=VolumeofthewallVolumeofabrickVolume of wall =25×2×34cu.mVolume of one brick =20100×10100×15200cu.m.=32000cu.m.Required number of bricks=(25×2×34)÷32000=25000

A brick measures $20 c m$ by $10 c m$ by $7 \frac{1}{2} c m$ . How many bricks will be required for a wall $25 m$ long $2 m$ high and $\frac{3}{4} m$ thick?