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A square room of volume 900 m’has a door of
2mx1.5m and two windows of 1.5mx1m . If the
cost of stone paving at the rate of Rs 7.50 per
square meter is Rs 1687.5 . Find the cost of
painting four walls of room at the rate of Rs.
12.5 per square meter.​


Sagot :

1687.5/7.5

=225

225×12.5

=2812.5