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CBSE Class 7 Answered

The diameter of a circular pipe is 20 cm. What length of a tape is required to wrap twice around the pipe? (Take straight pi= 3.14)
Asked by Topperlearning User | 08 Dec, 2015, 03:27: PM
answered-by-expert Expert Answer

Since the pipe is circular, we have to find the circumference of the pipe which is equal to the length of the tape required.

Here, diameter of the pipe = 20 cm

Circumference of the pipe = d

= 3.14 x 20

= 62.8 cm

Thus, length of the tape required to wrap around the pipe once is 62.8 cm.

Hence to wrap the pipe twice, we require 2 x 62.8 cm = 125.6 cm of the tape.

Answered by | 08 Dec, 2015, 05:27: PM

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