Two pipes function simultaneously the reservoir will be filled in 12 hours. One pipe fills reservoir 10 hours faster than the other. How many hours does the faster pipe take to fill the reservoir?
Select the correct option: A) 25 hrs B) 28 hrs C) 20 hrs D) 35 hrs E) 40 hrs
Explanation:   1/x + 1/(x + 10) = 1/12   x = 20   ANSWER IS 20 hrs
<result>C</result>
Two pipes function simultaneously the reservoir will be filled in 12 hours. One pipe fills reservoir 10 hours faster than the other. How many hours does the faster pipe take to fill the reservoir?