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January 30, 2015

January 30, 2015

Posted by **Reem** on Wednesday, February 19, 2014 at 3:08pm.

- PHYSICS -
**Damon**, Wednesday, February 19, 2014 at 3:19pmrowing speed = v

speed upstream = (v-c)

speed downstream = (v+c)

(v+c) * 2 = 10

(v-c) * 4 = 10 or (v-c) * 2 = 5

2 v + 2 c = 10

2 v - 2 c = 5

------------------add

4 v = 15

v = 15/4 = 3.75 km/hr

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