Question

curved surface area of cylinder which height is 10 cm and circular cylinder radius is 7 cm​

Answer 1

Answer:

748sq.cm

Step-by-step explanation:

Given: Radius=7cm,

Height=10cm

Total surface area=2πr(h+r)sq.units

=2× 22÷7×7(10+7)

=44×17=748sq.cm

Answer 2

$\LARGE\mathfrak{\underline{\underline{Given :-}}}$

$\qquad\tt{:}\longrightarrow{\texttt{Height of the cylinder = 10cm}}$

$\qquad\tt{:}\longrightarrow{\texttt{ Radius of the cylinder = 7cm}}$

$\LARGE\mathfrak{\underline{\underline{To \: \: \: Find :-}}}$

$\qquad\tt{:}\longrightarrow{\texttt{ C.S.A. of the cylinder = ?}}$

$\LARGE\mathfrak{\underline{\underline{Formula :-}}}$

$\large : \: \Longrightarrow\underline{\boxed{\textsf\textcolor{purple}{ {C.S.A._{ ( Cylinder ) } = 2 \pi r h } }}}$

$\LARGE\mathfrak{\underline{\underline{Solution :-}}}$

$\qquad\tt{:}\longrightarrow {\texttt{C.S.A. of cylinder = 2πrh}}$

$\qquad\tt{:}\longrightarrow {2 × 22/7 × 7 × 10}$

$\qquad\tt{:}\longrightarrow {2 × 22 × 10}$

$\qquad\tt{:}\longrightarrow\boxed{\textsf\textcolor{red}{ C.S.A. of the Cylinder = 440cm²}}$

$\LARGE\mathfrak{\underline{\underline{More \: \: \: Formula :-}}}$

$\qquad\tt{:}\longrightarrow{\textsf{T.S.A. of \underline {Cylinder} = 2πr( r + h )}}$

$\qquad\tt{:}\longrightarrow{\textsf{Volume of the cylinder = πr²h}}$

$\qquad\tt{:}\longrightarrow{\textsf{C.S.A. of a \underline{Cone} = πrl}}$

$\qquad\tt{:}\longrightarrow{\textsf{T.S.A. of a Cone = πr ( r + h )}}$

$\qquad\tt{:}\longrightarrow{\textsf{Volume of a Cone = 1/3 × πr²h}}$

$\qquad\tt{:}\longrightarrow{\textsf{T.S.A. of a \underline{Sphere} = 4πr²}}$

$\qquad\tt{:}\longrightarrow{\textsf{Volume of a Sphere = 4/3 × πr³}}$