A boat takes 2 hrs. 36 min. to travel 20 km downstream and 10 km upstream. If it takes 3 hrs. 24 min. to travel 10 km downstream and 20 km upstream, find the speed of the stream.

A boat takes 2 hrs. 36 min. to travel 20 km downstream and 10 km upstr

1.	A boat takes 2 hrs. 36 min. to travel 20 km downstream and 10 km upstream. If it takes 3 hrs. 24 min. to travel 10 km downstream and 20 km upstream, find the speed of the stream.
A.	50/3 km/hr
B.	50/7 km/hr
C.	50/9 km/hr
D.	100/21 km/hr
E.	100/27 km/hr
Answer» E. 100/27 km/hr

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A boat takes 2 hrs. 36 min. to travel 20 km downstream and 10 km upstream. If it takes 3 hrs. 24 min. to travel 10 km downstream and 20 km upstream, find the speed of the stream.

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