Question

What will be the cost of making a closed cone of tin sheet having radius of base 6 m and slant height 8 m if the rate of making is Rs 10 per sq.m?

Answer 1

Given: Radius (r) = 6 m, length (l) = 8 m

To find: Total cost of making the cone

i.To find the total cost of making the cone of tin sheet, first we need to find the total surface area of the cone.

Total surface area of the cone = πr (l + r)

= (22/7) x 6 x (8 + 6)

= (22/7) x 6 x 14

= 22 x 6 x 2 = 264 sq.m

ii.Rate of making the cone = Rs 10 per sq.m

∴ Total cost = Total surface area x Rate of making the cone

= 264 x 10

= Rs 2640

∴ A The total cost of making the cone of tin sheet is Rs 2640.