## Boats And Streams

A boat while dowenstream in a reiver converd a distance of 50 miles at an average speed of 60 miles per hour. While returning , because of the water resistance , it took 1 hour 15 minutes to cover the same distance What was the average speed during the whole journey?

**Options:**

A. | 40 mph |

B. | 48 mph |

C. | 50 mph |

D. | 55 mph |

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