Question

Nikko is printing 500 one-page flyers for a car wash. He is using two

printers. One printer can print 500 pages in 20 minutes. The other printer
can print 500 pages in 25 minutes. About how long will it take Nikko to
print the 500 flyers for the car wash using both printers?
-)
A
23 minutes
1)
B
11 minutes
) ©
9 minutes
-
D
5 minutes

Answer 1

11 minutes.

Explanation:

To print 500 pages the first printer takes 20 minutes.

Then in one minute it can print
`(500)/(20) = 25` pages.

Again, to print 500 pages the first printer takes 25 minutes.

Then in one minute it can print
`(500)/(25) = 20` pages.

So, working together both the printer will print (20 + 25) = 45 pages in 1 minute.

Therefore, they will print 500 pages in
`(500)/(45) = 11.11` minutes ≈ 11 minutes. (Answer)