A room is 9 m long, 8 m broad and 6.5 m high. it has one door of dimensions 2 m × 1.5 m and three windows each of dimensions 1.5 m × 1 m. find the cost of white washing the walls at rs 3.80 per square metre.
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By Formula-
TSA= 2(lb+bh+hl)
L=9m
B=8m
H=6•5m
Total Surface Area (TSA)= 1(9x8)+ 2(8x6•5 + 6•5x9)
=293m^2
Dimension Of One Door = 2m x 1•5m
=3m^2
Dimension Of Three Windows = 3(1•5 x 1)
= 4•5m^2
Cost = 293 - (3+4•5)
=285•5
=285•5 x 3.80
=₹1084•90
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PLS MARK ME BRAINLIIEST ANSWER RS. 1084.90
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