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A rectangular room measuring
3.2 m by 2.8 m has a height 2.4m
The walls of the room are to be
painted. Find the cost of painting
the four walls at ₹15 per square meter.
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Answer:
Length : 3.2m
Breadth : 2.8m
Height : 2.4m
Area of four walls = 2(lh+bh)
= 2(3.2*2.4 + 2.8*2.4)
= 2(7.68+6.72)
= 2(14.4)
= 28.8m²
Cost of 1m² = ₹15
Cost of 28.8m² =28.8*15
= ₹432
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