A particle is moving in a circular path of radius r. The dis———– half a circle would be :

(a) 2 r
(b) Zero
(c) pr
(d) None of these

Anurag Mishra Professor Asked on 18th January 2016 in Maths.
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    Answer: (a) 2 r 

    Anurag Mishra Professor Answered on 20th January 2016.
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