Question

The length , breadth and height of a room are 12m , 10m and 9m respectively . Find the area of the four walls .

Answer 1

Answer:

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$length = 12m \\ breath = 10m \\ height = 9m \\ \\ ⇒ \: 2(12 \times 9 + 10 \times 9) \\ \\ ⇒2 \times (108 + 90) \\ \\ ⇒ \: 2 \times 198 \\ \\ ⇒ \: 396 \: sq.m.$