CBSE Class 10 Maths (Standard) 2016 · Paper 30/1/1 · Question 31

A bucket open at the top is in the form of a frustum of a cone with a capacity of $12308.8$ cm${}^3$. The radii of the top and bottom circular ends are $20$ cm and $12$ cm respectively. Find the height of the bucket and the area of metal sheet used in making the bucket. (use $\pi =3.14$)