Question

A Bucket made up of metal sheet in the form of frustum of cone of height=16cm with diameter its lower and upper ends are 16cm and 40cm respectively. find the volume of the bucket and also find the cost of the bucket. if the cost of metal sheet used is RS20 per 100cm2

Hlp me plzzz...

Answer 1

Volume of frustum:- 1/3 πh(R^2+ r^2 + Rr)= 12,135 cm3

area of metal used= πl(R+r)+ πr^2

and l=

$\sqrt{ {h}^{2} + ( {r }^{2} - {r}^{2} } )$

may this help u