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26/07/2021 11:04 am
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The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and ceiling at the rate of Rs 7.50 per m2.
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26/07/2021 11:05 am
Length (l) of room = 5m
Breadth (b) of room = 4m
Height (h) of room = 3m
It can be observed that four walls and the ceiling of the room are to be white washed.
Total area to be white washed = Area of walls + Area of ceiling of room
= 2lh+2bh+lb
= [2 × 5 × 3 + 2 × 4 × 3 + 5 × 4]
= (30+24+20)
= 74
Area = 74 m2
Cost of white wash per m2 area = Rs.7.50 (Given)
Cost of white washing 74 m2 area = Rs. (74 × 7.50)
= Rs. 555