The length, breadth and hight of a room are 5m, 4m and 3m respectively. Find the cost of white-washing the walls of the room and the ceiling at the rate of 7.50 per square metre
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Step-by-step explanation:
given dimensions of cuboid
l = 5m b = 4m h = 3m
area of white washing = csa of cuboid + l×b
= 2h(l+b) + l×b
= 2(3)(9) + 20
= 74 m^2
1 m ^2 = 7.50 rupees
74 m^2 = 555 rupees
therefore cost of whote washing = 555 rupees
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