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Sum

The length, breadth, and height of a room are 6 m, 5.4 m, and 4 m respectively. Find the area of :

(i) its four-walls

(ii) its roof.

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#### Solution

Length of the room = 6 m

The breadth of the room = 5.4 m

Height of the room = 4 m

(i) Area of four walls = 2(L+B) x H

= 2(6 + 5.4) x 4 = 2 x 11.4 x 4 = 91.2 m^{2}

(ii) Area of the roof = L x B = 6 x 5.4 = 32.4 m^{2}

Concept: Surface Area of a Cuboid

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