A room is. 7 m long and 5 m broad . It has one door measuring 2m by 1.5 m and two windows, each measuring 1.5 m by 1m. The cost of painting the walls at ₹12.50 per sq m is ₹825.find the height of the room
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area to be paint = LSA of rect room -(ar of door +2*ar of window)
=2(L+B)H- (2*1.5+2*1.5*1)
=2(7+5)H -(3+3)
=24H- 6 sqm
area to be paint = total cost/cost per sqm
24H-6. =. 825/12.5
24H-6. = 66
24H. =66+6
H =72/24
H. =3m
=2(L+B)H- (2*1.5+2*1.5*1)
=2(7+5)H -(3+3)
=24H- 6 sqm
area to be paint = total cost/cost per sqm
24H-6. =. 825/12.5
24H-6. = 66
24H. =66+6
H =72/24
H. =3m
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