Question

It takes an older computer twice as long to send out a company's email as it does a newer computer. Working together, it takes the two computers 10 minutes to send out the email. How long will it take the older computer to send out the email on its own?

Answer 1

Answer:

13,33  MIN.

Explanation:

1. Time with Older Computer (OC) = 2 time with New Computer (NC)

2. OC+ NC = 10 MIN.

replacing 1. in 2.    OC + OC/2 = 10 min.  

1.5 OC =10min

OC=6.66 MIN

NC = 3,33 MIN.

If we replace NC with OC , 3,33 min will take 2 times (6,66 min)

Total Time = 6,66 + 6,66= 13,33 min