The length,breadtg,height of room are 5m,4m,3m, respectively.find the cost of waahimh the wall of the room and the celling at the rate of 7.5 per m2.
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0
Washing /painting is only needed on the sides and on the ceiling.
So the area to be painted = 2*b*h + 2*h*l + l*b
= 2*4*5 +2*3*5+5*4
=90 m2
Net cost to spend = 90 m2 *7.5/m2
= Rs 675
So the area to be painted = 2*b*h + 2*h*l + l*b
= 2*4*5 +2*3*5+5*4
=90 m2
Net cost to spend = 90 m2 *7.5/m2
= Rs 675
Answered by
4
Answer:
length 5m
Breadth 4m
Height 3m
curved surface area + area of rectangle is used here....
2(l+b)h +lb
2( 5+4)×3 +4×5 m²
= 74m²
Cost of white washing = RS. 7.50
7.50×74=Rs.555
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