Question

An icecream cone full of ice-cream having radius 5cm and height10cm is shown. Calculate the volume of the ice-cream provided that its one by sixth part is left unfilled with ice-cream

Answer 1

if 1/6 of the cone is left unfilled with ice cream then...
ice cream left will be 5/6 (1 - 1/6)of the cone..

NOW
the volume of ice cream =
5/6 * 1/3 * pi * r² * h

5/6 * 1/3 * 3.14 * 25 * 10

218 cm³