Question

A room is 12 m long 8 m broad and 4.5m high. Find the total area of its four walls roof and floor

Answer 1

total area =2 [(12×8) + (8×4.5) + (12 × 4.5)]
= 2[ 96 + 36.0 + 54.0]
=2×186
= 372

Answer 2

The total area of its four walls roof and floor is 372 sq.m.

Step-by-step explanation:

Length of room = 12 m

Breadth of room = 8 m

Height of room = 4.5 m

Total surface area of room = $2(lb+bh+hl)=2(12 \times 8 + 8 \times 4.5 + 4.5 \times 12)=372 m^2$

Hence the total area of its four walls roof and floor is 372 sq.m.

#Learn more:

A cuboid is 8 m long, 12 m broad and 3.5 high, Find its (i) total surface area

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