Question

the diameter and height of a cylinder are 42 cm and 10cm respectively. find its volume​

Answer 1

diameter=42

so radius=d/2=42/2=21

volume of cyclinder=πr^2h

=22÷7×21×21×10

=13860

Answer 2

$\large {\green {\sf {\underline {\underline {Step-by-step \: Explanation}}}:-}}$

$Radius \: of \: the \: base \: r = \frac{diameter}{2} = \frac{42}{2} cm = 21 \: cm \\ \\ Volume \: of \: the \: cylinder = \pi {r}^{2}h \\ \\ = (\frac{22}{7} \times 21 \times 21 \times 10) \: {cm}^{3} = 13860 \: {cm}^{3}$

The volume of the cylinder is 13860 cm³.

$\huge\dag\sf\red{By \: Divyanshu}$