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A body \( A \) starts from rest with an acceleration \( \mathrm{a}_{1} \).
P After 2 seconds, another body \( B \) starts from rest with

W an acceleration \( a_{2} \). If they travel equal distances in the \( 5^{\text {th }} \) second, after the start of \( A \), then the ratio \( a_{1}: a_{2} \) is equal to:
(1) \( 5: 9 \)
(2) \( 5: 7 \)
(3) \( 9: 5 \)
(4) \( 9: 7 \)
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