A room is 8.5 m long ,7 m broad and 4 m hight it has one door measuring 1 m and two windows each measuring 0.5 m by 0.5 m . Find the cost of painting its four walls without door and window , if the rate of painting is Rs 2 per square metre
Answers
Answered by
2
Answer:
L=8.5m,B=7m,H=4m
Step-by-step explanation:
area of 4 wall=2(l+b)h
=2(8.5m+7m)4m
=2(15.5m)4m
=31 x 4
=124
Answered by
8
Answer:
Paintable area = Litral surface area - One door area + 2 windows area
2(l+b)×h - (1×1+2×0.5×0.5)
2(8.5+7)×4-(1+0.5)
2×15.5×4-1.5
31×4-1.5
124-1.5
122.5
hence, total cost of painting
122.5×2
245 rs. answer
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