Задача 10932.

The speed of the bus between two points, the distance between which is S km, equal to V1 = 90 km / h. A bus stop in a way making the total time that the stop t = 0.5 h. The average speed of the bus all the way V2 = 60 km / h. Find the distance S.

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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