find the surface area of a room of length 25m, height 15m and width 5m.
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Answer:
l =25m
b=5m
h=15m
Total surface area of rectangle = 2(lb+bh+lh)
= 2(25×5+5×15+25×15)
= 2(125+75+375)
= 2×575
= 1150m^2
Lateral surface area of rectangle = 2(l+b)h
= 2×30×15
= 900m^2
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