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4 June, 12:23

Toya can run one lap of the track in 1 min. 3 sec., which is 90% of her younger sister niki's time. what is niki's time for one lap?

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  1. 4 June, 15:03
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    63 seconds is 90% of Niki's time for one lap. Therefore Niki's time for one lap is 63/0.9=70 seconds or 1 min. 10 sec.
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