Solve the problem.
-The Epson Stylus 850 can print Helen's class project in 18 minutes. The Epson Stylus 500 can print the project in 42 minutes. If the two printers work together, how long would they take to print out the project?
A) $12 \frac{3}{5}$ minutes
B) $\frac{5}{63}$ of a minute
C) 10 minutes
D) 126 minutes

Question

Quizplus · Accepted Answer

The combined rate of the two printers is the sum of their individual rates, which are $1/18$ and $1/42$ projects per minute, respectively. Adding these rates gives $\frac{1}{18} + \frac{1}{42} = \frac{7}{126}$ projects per minute. To find the time to complete one project, take the reciprocal of this rate, which is $126/7 = 18$ minutes. This simplifies to $12 \frac{3}{5}$ minutes.

Solve the Problem 123512 \frac{3}{5}1253​ Minutes B) 563\frac{5}{63}635​ Of a Minute C) 10 Minutes D) 126 Minutes

Solve the Problem $12 \frac{3}{5}$ Minutes
B) $\frac{5}{63}$ Of a Minute
C) 10 Minutes
D) 126 Minutes