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Mathematics, 11.12.2019 04:31 MacieKay8865

The average speed of a roadside truck is 60 km/h and in the mountainous road 40km/h. this truck did the 200 km road for 4 hours. how km was the mountainous part of the road? need to solve with equation.

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The average speed of a roadside truck is 60 km/h and in the mountainous road 40km/h. this truck did...
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