4. A room is 10m long, 6m wide and 4.2m height. It has one door of 2.5 – InterviewSolution

1.	4. A room is 10m long, 6m wide and 4.2m height. It has one door of 2.5m by 1.5m and one window edimension 1.5m by 1m. Find the cost of painting the walls at 2.50 per sq. m.
Answer» Area of room=2×h(l+b)=2×4.2 (10+6)=8.4×16=134.4sq.marea of door =2.5×1.5=3.75sq.marea of Window =1.5×1=1.5sq.marea of walls=room-door-window =134.4 -3.75 -1.5=132.15sq.mcost of whitewashing =132.15×2.50=333.0rupees

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