Question

To determine the diameter of the rod a student wound a thread 5 times round the rod and measure the length of thread as 156mm on metre scale.Using this value he calculated the diameter of the rod.If the actual diameter of the rod is 9.94mm , what is the error that could result in the method followed by the student?
[Take π=22/7 ]​

Answer 1

Explanation:

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 p r + q 2 pr+q2Read more on Sarthaks.com - https://www.sarthaks.com/2184098/determine-diameter-student-wound-thread-times-measured-length-thread-metre-scale-using