Question

A company has two large computers. The slower computer can send all the company's email in 50 minutes. The faster computer can complete the same job in 30 minutes. If both computers are working together, how long will it take them to do the job?
Do not do any rounding.

Answer 1

using only the numbers given to you, 30 and 50, the quick answer is \[\huge \frac{30\times 50}{30+50}\]
you still have to compute that number though