What will be cost to paint a room of length 15m breadth 6m and height 5m if the rate to paint is Rs.12 per sq.meter?
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length= 15 m
breadth= 6 m
height= 5 m
painting a room = all the 4 walls + roof
= LSA of cuboid + area of rectangle
= 2 h ( l + b ) + l x b
= 2 x 5 ( 15 + 6 ) + 15 x 6
= 10 x 21 + 90
= 210 + 90
= 300 m²
rate per meter = Rs. 12
= 300 x 12
=Rs 3600
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