## a boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. the speed of the stream is--------?

a boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. the speed of the stream is--------?

7 km/h | |

5 km/h | |

2 (1/2) km/h | |

3 km/h |