in the second room there are 2 doors of height 2.5m. and 1.5m. wide. Also there are 2 windows which are 1.5m. wide and 1.8m. high. let's calculate the cost of plastering its walls excluding the doors and windows at the rate of rs.75 per square meter.
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area of doors=l×b
=2.5×1.5(m square)
=3.75m square
area of 2 doors=2×(3.75m square)
=7.5m square
area of window=l×b
=1.5×1.8(m square)
=2.75m square
area of 2window=2(2.75m square)
=5.5m square
The cost of plastering 1m square =Rs.75
Total area of windows and door =(7.5+5.5)m square
=13m square
The cost of plastering 13m square =(13×75 )m square
=Rs.975 answer
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