Question

the radius of a circular pipe is 20 cm. what length of a tape is required to wrap around the pipe once? what length of tape is required to wrap around the pipe 5 times?​

Answer 1

Given:

Radius of the circular pipe = 20cm.

To Find , the circumference of the pipe .

We know that,

$\boxed{\bold{Circumference =2\pi r}}$

According to the question,

$\implies\bold{circumference = 2\times \dfrac{22}{7}\times 20cm}$

$\implies\bold{\dfrac{880}{7}cm = 125.71cm}$

The tape required to wrap around it once = 125.71 cm.

Let find the tape required to wrap around it 5 times :

Tape required to wrap it 5 times = $\bold{125.71cm\times 5= 628.55cm }$

Hence , tape required to wrap around it 5 times is 628.55cm.

Answer 2

$\underline\bold{Answer}$

Tape required once => 125.71cm
Tape required 5 times =>628.55cm

$\boxed{\textbf{Step-by-step Explanation}}$

$\boxed{\textbf{Given}}$ :- Radius of circular pipe is 20 cm.

$\boxed{\textbf{Find}}$:-Pipe 's circumference .

$\underline\bold{Formula \:used}$:- 2πr

Now , According to question. .
putting of values in the given formula .

=> 2× $\dfrac{22}{7}$×20cm

=>$\dfrac{44}{7}$ × 20cm.

=>$\dfrac{880}{7}$cm.

=>125.71cm

$\textbf{We find the tape required once to wrap the pipe }$

$\underline\bold{125.71}$

Now, we have to fine required tape to wrap around pipe 5 times.

$\underline\bold{125.71\:×\:5}$

Final Answer :- 628.55cm.