Question

1. The slant height and base diameter of a conical tomb are 25 m and 14 m respectively.
the cost of white-washing its curved surface at the rate of 210 per 100 m^2.
2. A joker's cap is in the form of a right circular cone of base radius 7 cm and height
Find the area of the sheet required to make 10 such caps.
3 . 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
If the outer side of each of the cones is to be painted and the cost of painting is
12 per m', what will be the cost of painting all these cones? (Use t = 3.14 and take
1.04 = 1.02).



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Answer 1

Step-by-step explanation:

For conical tomb

slant height= 25m

diameter =14m

radius = 14/ 2=7m

Curved surface area= πrl =22/7×7×25 = 22×25 =550m

1 m^area cost =210/100

550m^ " "= 210/100 ×550 =1155 m^