the cost of plastering a room which is 4m high and breadth is one-third of its length is rs 640 at the rate of rs 5/m^2. what will be the cost of carpenting its floor at the rate of ts 250/m^2?
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Step-by-step explanation:
l=?
b=l/3
area of rectangle = l×b = l×l/3
given is cost of rectangular₹640 and rate is 5m^2
cost = rate × area
640 = 5 × l^2/3
640×3/5=l^2
8√6=l
area of plastering of a room = 2(l+b)h
= 2(8√6+8√6/3)4
area of plastering of a room = 204.72m^2
cost of plastering = 204.72×250
= ₹51180
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