Answer:
Required Answer:-
Given picture is a Cylinder.
- Where radius r=tcm
- Height =h=7cm
- Volume =84cm^3
As we know that in a Cylinder
[tex]{\boxed{\sf Volume ={\pi}r^2h}}[/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf {\dfrac {22}{{\cancel{7}}}}\times t^2\times{\cancel{7}}=84 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf 22×t^2=84 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf 22t^2=84 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf t^2={\dfrac {84}{22}}[/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf t^2=3.81 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf t={\sqrt {3.81}}[/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf t=1.95 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf t=2cm (Approx)[/tex]
