Question

A contianer open from top and has frustum with height 30 cm radius 30 cm and 10 cm find cost of milk wihich can be 30 rupees per litre

Answer 1

cost of milk is rs.282.84

Answer 2

1/3πh(r1^2+r2^2+r1r2)

1/3×22/7×30(900+100+300)

220/7×1300

286000/7

40857.14×30

1225714.29