A room is 8m long , 6m wide and 3.5 m high. Find the cost of white washing its four walls at the rate of Rs 50 per square meter.
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Step-by-step explanation:
lateral area of room= 2h(l+b)
= 2×3.5(8+6)
= 2×3.5×14
= 98m sq
total rupees for washing four walls
=98×50
=4900rs
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