Question

A bus stop is barricaded from the remaining part of the road ,by using 150 hollow cones made of recycled cardboard. Each cone has a base diameter of 49cm and height 10m . If the outer side of each of the cones is to be painted and the cost of painting is Rs. 150 per m 2 ,what will be the cost of painting all these cones?​

Answer 1

Answer:

=30.5613rs

Step-by-step explanation:

first we find out the CURVED SURFACE AREA OF THE cone- πrl

l²=r²+h²

l²=24.5²+10²

l²=600.25+100

l²=700.25

l=√700.25

l=26.46

CSA of cone=22/7*24.5*26.46

=2037.42m²

in m²=2037.42/10000

=0.203742

cost of paint=150x0.203742

=30.5613rs