Question

If the curved surface area of a cynlinder is 154cm and the height is 7cm find the radius

Answer 1

Answers:

$\huge{\boxed{\boxed{\sf{R=3.5cm}}}}$

Step-by-step explanation:

$\huge{\boxed{\boxed{\underline{\sf{SOLUTION}}}}}$

>>C.S.A of cylinder= 154cm^2

>>height of cylinder= 7cm

<<We have to find radius of cylinder

$csa \: of \: cylinder = 154 {cm}^{2} \\ 2\pi rh = 154 \\ 2 \times \frac{22}{7} \times r \times 7 = 154 \\ = )44r = 154 \\ = ) r = \frac{154}{44} \\ = ) r = \frac{7}{2} \\ = ) r = 3.5$

$\huge{\boxed{\boxed{\sf{R=3.5cm}}}}$

Answer 2

Answer:-

$\bold{CSA \: of \: the \: cylinder = {154cm}^{2} }$

$\bold{Height = 7cm}$

$\bold{Radius = ?}$

$\boxed{2\pi \: rh}$

$\bold{2 \times \frac{22}{7} \times r \times h}$

[7 gets cancelled]

$\bold{44r = 154}$

$\bold{r = \frac{154}{44} }$

$\bold{r = \frac{7}{2} }$

$\bold{r = 3.5}$