Question

2. To determine the diameter of a rod a student wound
a thread 5 times round the rod and measured the
length of thread as 156 mm on a metre scale. Using
this value he calculated the diameter of the rod. If the
actual diameter of the rod is 9.94 mm, what is the
error that could result in the method followed by the

student? Take π =22/7

(a) + 0.01 mm
(b) - 0.01 mm
(c) + 0.02 mm
(d) - 0.02 mm

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Answer 1

Explanation:

- 0.01 mm is the correct answer