Question

A student winds a strip of paper 8 times round a cylindrical pencil if diameter 7 mm. use the value 22/7 for π to find the length if the paper.(ignore the thickness of the paper.)

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Answer 1

The circumference of the pencil can be calculated using the formula C = πd, where C is the circumference and d is the diameter. Substituting the value of d as 7 mm and using the value of π as 22/7, we get:

C = (22/7) * 7 mm = 22 mm

Since the paper is wound around the pencil 8 times, the length of the paper would be 8 times the circumference of the pencil. So, the length of the paper is:

8 * C = 8 * 22 mm = 176 mm

Therefore, the length of the paper is 176 mm.