A particle experiences a constant acceleration for $20\, seconds$ after starting from rest. If it travels a distance $s_1$ in the first $10\, seconds$ and distance $s_2$ in the next $10\, seconds$, then :-
- A$s_2 = s_1$
- B$s_2 = 2s_1$
- C$s_2 = 3s_1$
- D$s_2 = 4s_1$
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