GRE Sample Test 3 Quantitative Reasoning 2

Question : 12 of 20

Marks: +1, -0

Two machines, working simultaneously at their respective constant rates, can print 400 sheets in 5 hours. If one machine can print 200 sheets in 3 hours, what is the rate of the other machine, in sheets per hour?

${40}/3$
${80}/3$
${100}/3$
500
200

Validate

Solution:

The combined rate of the two machines is 400 sheets/5 hours = 80 sheets/hour. The rate of the first machine is

{200}/3

. Let the rate of the second machine be y.
Thus

{200}/3+y

= 80
y =

80-{200}/3

⇒ y =

{240}/3-{200}/3

⇒ y =

{40}/3

Go to Question:

Prev Question

Next Question