Rj can do a job in 3 hours. Jane can do the same job in 5 hours. How long would it take, if they worked together in the same job?
but jane have 2 hour untill she discharge with there work
solution 5 is jane hour of her work
3 is rj hour of his work
2 is the minus of rj hour
so if you solve it the answer is 8
sorry if I'm wrong