Question

there are two machines that produce aluminium cans. the newer machine can produce 7200 cans in 200 minutes. it takes the older machine 300 minutes to produce that many cans. if the two machines work together, how long will it take them to produce 7200 cans?

Answer 1

Each minutes they will produce
7200/200+7200/300
=36+18
=54 cans
Time required to produce 7200 cans
=7200/54
=133minutes 20 seconds.