3.) One pump can fill a tank with oil in 4 hours. A second pump can fill the same tank in 3 hours. If both

pumps are used at the same time, how long will they take to fill the tank?

GAMEMASTERX40 Feb 10, 2019

#1**0 **

1/4 + 1/3 =1/T

1/T = 7/12 Take the reciprocal of both sides

**T =12/7 =1 5/7 - hours =~ 1 hour and 43 minutes for both pumps to fill the tank.**

Guest Feb 10, 2019

#3**-2 **

1/3 + 1/4 = 1/ Total Time Working Together

4/12 + 3/12 = 1 / T

7 /12 = 1 / T [ remember that we can write ]

12 / 7 = T / 1

12/ 7 = T

T = 12/7 hrs ≈ 1.7 hrs = 1 + .7(60) = 1 hr 42 min

Original Answer: https://web2.0calc.com/questions/4-sketch-a-graph-of-a-polynomial-that-would-have-help

Credit To: CPhill

-- 7H3_5H4D0W

GAMEMASTERX40 Feb 10, 2019