SOLUTION: theres a tank and theres 2 taps that pour into it first tap fills it up in 30 min fills it up in 90 min how long will it take to fill up the tank if both taps where ope

Algebra ->  Rate-of-work-word-problems -> SOLUTION: theres a tank and theres 2 taps that pour into it first tap fills it up in 30 min fills it up in 90 min how long will it take to fill up the tank if both taps where ope      Log On


   

Question 1065102: theres a tank and theres 2 taps that pour into it
first tap fills it up in 30 min
fills it up in 90 min
how long will it take to fill up the tank if both taps where open

Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
Rate unit is TANK%2FMINUTES.

Rate for both taps open is the sum of their rates.
1%2F30%2B1%2F90
3%2F30%2B1%2F90
4%2F90
2%2F45

The time in minutes to fill the one tank is 45%2F2=22%261%2F2 minutes.