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Q.

The area of four walls of room 12 mts×8 mts×5 mts  is

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a

500 sq.mts

b

200 sq.mts

c

100 sq.mts

d

1000 sq.mts

answer is D.

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Detailed Solution

l=12 m, b=8 m, h=5 m

Area of four walls =2h(l+b)

=2×5(12+8)

=10×20

=200 mt2

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