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Q.

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


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a

60.4 cm

b

64.7 cm

c

62.8 cm

d

63.5 cm 

answer is C.

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Detailed Solution

Radius of the circular pipe, r is 10 cm.
To find out,
Length of tape that can be wrapped around the pipe once
The pipe is circular in shape.
Hence, the length of tape required to wrap around the pipe will be equal to the circumference of the pipe.
We know that,
Circumference of a circle=2πr units
Here, r = 10 cm and π = 3.14
Then, C= 2πr = 2×3.14×10 = 62.8 cm
Hence, the length of the tape required to wrap once around the given pipe is 62.8 cm.
Hence, option 3 is the correct answer.
 
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