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Srosh can jog at 10 km per hour in sunny weather and at 6 km per hour in rainy weather. She jogs 20 km in 3 hours. How much time (in hours) during her run was it raining

 Nov 8, 2020
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6 x    + 10 (3-x)   = 20      solve for 'x' the rain running time in hours

 Nov 8, 2020

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