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Question

The x and y co-ordinates of a particle at any time ‘t’ are given by x = 2t + 5t2 and y = 7t, where x and y are in metre and t is in second. Velocity of the particle at t = 2 s will be

किसी समय t पर एक कण के x तथा y निर्देशांकों को x = 2t + 5t2 तथा y = 7t द्वारा व्यक्त किया जाता है, जहाँ x तथा y मीटर में हैं तथा t सेकण्ड में है। t = 2 s पर कण का वेग होगा

A
(10^i+7^j)m/s
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B
(24^i+14^j)m/s
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C
(22^i+7^j)m/s
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D
7^jm/s
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Solution

The correct option is C (22^i+7^j)m/s
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