109) A classroom is 10 m long, 7 m wide and 5 m high. Find the cost of
plastering the walls at the rate of 1.50 per mº?
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255 RS
Step-by-step explanation:
laternal surface area of cuboid - 2(l+b)×h
=2×17×5
=170
total cost of plastering =170 ×1.50
=255RS
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