8.
A bus stop is barricaded from the remaining part of the road, by using 50 hollow
cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height
1 m. If the outer side of each of the cones is to be painted and the cost of painting is
12 per mº, what will be the cost of painting all these cones? (Use t = 3.14 and take
V1.04 = 1.02)
Answers
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Radius = 40/2 = 20 cm
Height = 1m = 100cm
CSA OF CONE =2x pie x radius x height
=2x3.14x20x100=40x314=12560cm square units = 12560/100 = 125.6 m
Cost of painting = 12 rupees per m
=12x125.6x50 = 75,360 rupees
U might want to double check the calculations and the values of ur question
Height = 1m = 100cm
CSA OF CONE =2x pie x radius x height
=2x3.14x20x100=40x314=12560cm square units = 12560/100 = 125.6 m
Cost of painting = 12 rupees per m
=12x125.6x50 = 75,360 rupees
U might want to double check the calculations and the values of ur question
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