Question

A semi-circular sheet of metal of diameter 28cm is bent to form an open conical cup. find the capacity of the cup.

Answer 1

Easy one.
First when you make a cone with a sheet, its diameter becoms your circumference of basal circle.
using relation
$28 = \pi {r}^{2}$
find r.
Now you have to find the volume of cone.
simply use the formula
$v = 1 \div 3\pi {r}^{2} h$
in order to find its volume.
It's that much simple!

Hope you will manage this!
Don't forget to make it brainliest!