Question

It takes 60 minutes to make 2000 copies on an old copy machine. When a newer copier works alongside the old copier, 2000 copies can be made in 15 minutes. How many minutes are required for the newer copier working alone to make 2000 copies?

Enter your answer in the box

_____ min

CAN ANYONE HELP ME PLEASE ASAP. NEED HELP REALLY BADLY!!!!

Answer 1

20 minutes is your answer i believe

Answer 2

`20\ minutes`

Explanation:

we know that

An old copy machine takes
`60` minutes to make
`2,000` copies

so

by proportion

Find how many copies makes in
`15` minutes

`(2,000)/(60)=(x)/(15)`

`x=2,000*15/60=500\ copies`

Remember that

A newer copier works alongside the old copier takes
`15` minutes to make
`2,000` copies

that means that the newer copier in
`15` minutes makes
`2,000-500=1,500` copies

so

The newer copier takes
`15` minutes to make
`1,500` copies

by proportion

Find how many minutes are required for the newer copier working alone to make
`2,000` copies

`(15)/(1,500)=(x)/(2,000) \\ x=2,000*15/1,500\\x=20\ minutes`