The length,breadth and height of a hall are 5m, 6m, and 7m, respectively. The has one door of area 1m× 0.5m. Find the cost of painting the walls (only the walls) at the rate of ₹90 per square metre.
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Answer:
l=5m
b=6m
h=7m
f=2{l+b}h
2×11×7
22×7
154cm
area of one door =5m
area of hall excluding door =149m
cost of panting = 149m×90=13940rs.
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