Question

a student measures circumference of a circular copper pipe .he wraps a length of string four times around the pipe and marks it with ink .the student unwraps the string and holds it against the ruler with a centimetre scale the student find the total mass length of string of 4 turns is 354 mm .calculate the average mean circumference of pipe

Answer 1

Answer:

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Answer 2

Answer:

8.85 mm

Explanation:

I hope it is wrong