Practice | Hashtable

1. How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm?

A. 5600

B. 6000

C. 6400

D. 7200

Solution:

\begin{aligned} Number of bricks \\ = \frac{Volume of the wall}{Volume of 1 brick} \\ = \frac{800 \times 600 \times 22.5}{25 \times 11.25 \times 6} \\ = 6400 \end{aligned}

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