A particle is moving in a straight line with initial velocity u and uniform acceleration a. If the sum of the distances travelled in t1 and t2 seconds is s, then the time taken by it to travel a distance s starting from rest is:
A. \(\sqrt{t_1 + t_2}\)
B. \(\sqrt{t_1^2 + t_2^2}\)
C. \(\sqrt{t_1 t_2}\)
D. \(\sqrt{\frac{t_1 t_2}{t_1 + t_2}}\)
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