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Mathematics, 23.06.2019 05:10 Govind3793

Daniella walks xkm at 5km/h and then runs (x+4) km at 10km/h. the average speed of this journey is 7km/h. find the value of x

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Daniella walks xkm at 5km/h and then runs (x+4) km at 10km/h. the average speed of this journey is 7...

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