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January 28, 2015

January 28, 2015

Posted by **alms** on Tuesday, April 23, 2013 at 7:57pm.

- math algebra -
**Henry**, Friday, April 26, 2013 at 8:39pm(15+Vc)t = 20

Eq1: 15t + Vc*t = 20

(15-Vc)t = 10

Eq2: 15t - Vct = 10

Add Eq1 and Eq2:

15t + Vct = 20

15t _ Vct = 10

30t = 30

t = 1 h.

15*1 + Vc*1 = 20

Vc = 20-15 = 5 mi/h. = Velocity of current.

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