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Volume of Regular Solids

A brick has a...

Question

A brick has a cubic shape and has an edge of length 45 cm. How many such bricks can fit in a room having a length of 4.5 m, breadth of 2.7 m and height of 1.8 m.

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Solution

Volume of room $= 4.5 \times 2.7 \times 1.8 c m^{3} = 2187 \times 10^{4} c m^{3}$
Volume of brick $= 45^{3} c m^{3} = 91125 c m^{3}$
No. of brick $= 240$

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