Question

A bucket made up of a metal sheet is in form of a frustum of cone of height 16cm with diameters of its lower and upper ends as 16cm and 40cm. find thee volume of bucket. Also find cost of bucket if the cost of metal sheet used is Rs 20 per 100cm²

Answer 1

Given height off frustum cone = 16cm 

Diameter of lower end of bucket (d₁) = 16cm

Lower and radius (r₁) = 16/2 = 8cm

Upper and radius (r₂) = 40/2 = 20cm 

Let ‘l’ be slant height of frustum of cone

Slant height of frustum cone (l) = 20cm

Curved surface area of frustum cone