Practicing for a competition, a swimmer saw that he could swim 20 km downstream in just 1 hr while it took 2 hrs to swim upstream. Find the speed of the river and that of the swimmer respectively.

Practicing for a competition, a swimmer saw that he could swim 20 km d

1.	Practicing for a competition, a swimmer saw that he could swim 20 km downstream in just 1 hr while it took 2 hrs to swim upstream. Find the speed of the river and that of the swimmer respectively.
A.	4 km/hr ; 16 km/hr
B.	5 km/hr ; 15 km/hr
C.	6 km/hr ; 14 km/hr
D.	8 km/hr ; 12 km/hr
Answer» C. 6 km/hr ; 14 km/hr

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Practicing for a competition, a swimmer saw that he could swim 20 km downstream in just 1 hr while it took 2 hrs to swim upstream. Find the speed of the river and that of the swimmer respectively.

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