Question

The radius of a circular pipe is 7 cm. Then the length of a tape is required to wrap once around the pipe is​

Answer 1

AnswEr:

• 44 cm

GivEn:

• Radius of circular pipe = 7 cm

To find:

• Length of a tape required to wrap once around the pipe?

Solution:

★ According to the Question:

• Length of a tape required to wrap around the pipe = Circumference of circular pipe

We know that,

★ Circumference of circle = 2πr

Therefore,

→ 2 × 22/7 × 7

→ 2 × 22

→ 44 cm

Hence, Length of a tape required to wrap once around the pipe is 44 cm.

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★ More To know:

• Area of Circle = πr²

• TSA of cylinder = 2πr(r + h)

• CSA of cylinder = 2πrh

• Volume of cylinder = πr²h

Answer 2

${ \huge{ \underline{ \underline{ \sf{Required \: answer:}}}}}$

$\bigstar \leadsto\sf \: Radius \: of \: the \: circular \: pipe \: = 7 cm \: \\ \\ </p><p></p><p>\bigstar\leadsto \sf \: Circumference \: of \: the \: pipe = \: 2\pi \: r$

$\\ \bigstar \leadsto = \sf \: 2 \times \frac{22}{7} \times 7$

$\bigstar\leadsto\sf \: 2 \times 22 = 44$

$\bigstar \leadsto\sf \: 44 \: cm$

So, the length of the tape is 44cm to wrap around the pipe..