A classroom is 12 m long, 7 m wide and 4 m high. Find the cost of repairing the ceiling and the walls @ of ₹15/sq m.
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Answer:
area of the classroom is:
= 2(l+b)h + lb
= 2(12+7)4 + (12)(7)
= 152 + 84
= 236 m²
cost for repairing:
= 236 * 15
= ₹3540
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