SOLUTION: One printer can print Mark's project in 12 minutes . Another printer can print his project in 42 minutes. If the two printers work together how long would they take to print the p

Algebra ->  Rate-of-work-word-problems -> SOLUTION: One printer can print Mark's project in 12 minutes . Another printer can print his project in 42 minutes. If the two printers work together how long would they take to print the p      Log On


   

Question 993555: One printer can print Mark's project in 12 minutes . Another printer can print his project in 42 minutes. If the two printers work together how long would they take to print the project
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Unit for rate is PROJECT%2FMINUTE. The rates of the printers working together are additive.

1%2F12%2B1%2F42 and you are looking for 1%2F%281%2F12%2B1%2F42%29, which you want to simplify.