a classroom is 8m long 7m broad and 4.5 m high
doors and window occupy an area of 18 m sq
find the cost of whitewashing the walls at the rate of rs 2.50 sq.m
please answer
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Answered by
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Curved surface area of cuboid = 2( lb + bh)
= 2(8×7 + 7× 4.5)
= 2(56+31.5)
=2(87.5)
= 175 sq. m
area of white washing = C.S.A of wall - area of window and doors
= 175 - 18
= 157 sq. m
cost of white washing = 157 × 2.50
=₹ 392.5
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2
Answer:
392 is the answer...........
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