Mathematics
A rectangular room is 6 m long, 4.8 m wide and 3.5 m high. Find the inner surface area of the four walls.
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Answer
It is given that
Length of rectangular room = 6 m
Breadth of rectangular room = 4.8 m
Height of rectangular room = 3.5 m
By formula,
Inner surface area of four walls = 2(l + b) × h
= 2(6 + 4.8) × 3.5
= 2 × 10.8 × 3.5
= 21.6 × 3.5
= 75.6 m2.
Hence, inner surface area of four walls = 75.6 m2.
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