The radius of a circular pipe is $10 c m$ . What length of a tape is required to wrap once around the pipe $(π = 3.14)$ ?

62.8 c m

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31.4 c m

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62 c m

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60 c m

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Solution

The correct option is A $62.8 c m$
Given: Radius of the pipe $= 10 c m$

Length of tape required is equal to the circumference of the pipe.

Circumference of a circle $= 2 π r$

Circumference of the pipe $= 2 π r$

$= 2 \times 3.14 \times 10 c m$

$= 62.8 c m$

The circumference of the pipe is $62.8 c m$ .

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Question 8

Calculate the length of tape required to encircle a circular ring of radius 10 cm.

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The radius of a circular pipe is 10 cm. What length of a tape is required to wrap once around the pipe (π=3.14)?

The correct option is A 62.8 cm Given: Radius of the pipe =10 cm Length of tape required is equal to the circumference of the pipe. Circumference of a circle =2πr Circumference of the pipe =2πr =2×3.14×10 cm =62.8 cm The circumference of the pipe is 62.8 cm.

The radius of a circular pipe is $10 c m$ . What length of a tape is required to wrap once around the pipe $(π = 3.14)$ ?