The length,breadth and height of a room are 5m, 4m and 3m respectively. Find the cost of white washing the inner of the room and ceiling at the rate of Rs 50 per square metre.
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Answer:
lets find the total area to be whitewashed
i.e.
l.s.a.+lb [area of top]
2h{l+b} +lb
2*3*9+5*4
54+20
74 m.sq
cost =area *rate
50*74
total cost =3700 Rs
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