Question

the radius of base of a clinder is 7cm and its height is 10cm . Find its area its curved surface area and total surface area​

Answer 1

Answer:

All the plant and animal in a particular area with ther surrounding

Step-by-step explanation:

Answer 2

Required Answer:-

Given:-

Radius of the cylinder = 7cm

Height of the cylinder = 10cm

To Find:-

Curved surface area of the cylinder.

Total surface area of the cylinder.

Solution:-

We know that :-

$</p><p>\begin{gathered}\\\underline{\boxed{\pmb{Curved \: surface \: area \: of \: a \: cylinder = 2\pi rh\:sq.units}}}\\\\\end{gathered}$

Therefore,

Substituting the values we find:-

$\begin{gathered}\\\sf{Curved \: surface \: area } =\bold{ 2 \times \frac{22}{7} \times 7cm \times 10cm}\end{gathered}$

$\sf{\rightarrow{Curved \: surface \: area = \bold{(2 \times \frac{22}{7} \times 7 \times 10)cm {}^{2} }}}$

$</p><p>\begin{gathered} \sf{\rightarrow{Curved \: surface \: area = \bold{\red{440cm {}^{2} }}}}\\\\\end{gathered}$

Again,

$\begin{gathered}\\\underline{\boxed{\pmb{Total\: surface \: area \: of \: a \: cylinder = 2\pi r(r + h)sq.units}}}\\\\\end{gathered}$

Therefore,

Substituting the values :-

$\begin{gathered} \\ \sf{Total \: surface \: area = \bold{2 \times \frac{22}{7} \times 7cm(7cm + 10cm)} }\end{gathered}$

$</p><p>\sf{\rightarrow{Total \: surface \: area = \bold{(2 \times \frac{22}{7} \times 7 \times 17) {cm}^{2} } }}$

$\begin{gathered} \sf{\rightarrow{Total \: surface \: area = \bold{\red{{748cm}^{2} }}} }\\\\\end{gathered}$

$\begin{gathered}\\\underline{\boxed{\rm{\green{Hence, \: C.S.A. \: of \: the \: cylinder \: is \: \bold{ 440 {cm}^{2} } \: and \: T.S.A \: of \: the \: cylinder \: is \: \bold{748 {cm}^{2}}}}}} \end{gathered}$