A bus stop is barricaded from the remaining part of the road by using 50 hollow cones made up of recycled cardboard. Each cone has a diameter of 40cm and height 1m. If the outer side each of the cones is to be painted and the cost of painting is 12 rupee per meter square , what will be the cost of painting of all these cones? (PLS DO NOT POST IRRELEVANT ANSWERS , THE BEST ANSWER WILL BE MARKED AS THE BRAINLIEST)
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Answer:
Diameter of cones = 40cm
Radius of cones = 40/2 = 20 cm
Height of cones = 1m =100cm
curves surface area = pi,r,l
= 3.14×20×100
= 12280cm
curved surface area of 50cones =12280×50
=614000cm
=6140m
cost of painting 1meter squre =12Rs
cost of painting 6140meter square=12 ×6140
= 73680Rs
73680Rs Rs is required for painting all the cones .
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