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30 March, 20:02

Dina and Masha start cycling on a 20 km bike path at the same time. When Dina reaches the end of the path, Masha still has 4 km of the path left to cycle. If Dina's cycling speed is 10 km/h, how much time longer will Masha need to complete the path?

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  1. 30 March, 23:09
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    30 minutes

    Step-by-step explanation:

    Dina took 2 hours to finish the path, since she biked at 10 km/h.

    This means Masha was biking at 8 km/h because in 2 hours she only biked 16 km.

    To bike 4 more km, it will take her 30 minutes or 0.5 of an hour.
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