so they will finish the whole job in 6/5 hrs = 1.2 hrs = 1 hr, 12 mins

and it’s like

(a X b) / (a + b)

so…if (a) was james and (b) was frank, just plug ’em in

u would have 6 / 5 = 1.2

*u can try using this equation for similar problems! like this kinda..

if james takes 1 hour to mow the lawn and frank takes 1.5 hours to mow the lawn, how long would it take if they were both working together? .6 hours =P

Let F = Frank’s speed. How quickly does Frank work? He can type 1 report in 2 hours, so his speed is F = (1 report/2 hours) = 0.5 reports/hr. I’ll let you find James’s speed J reports/hr.

Since Frank’s speed is 0.5 reports/hr., that means that after one hour of Frank working alone, 0.5 reports will be completed. After 1 hour of working alone, James will complete J reports.

Their speed together is (F+J) reports/hr. After one hour of work, the pair would have completed (F+J) reports. So how many hours would it take to finish one full report? That’s your answer.

Try 1.25–although that’s not really practical, since James wouldn’t know where to start, page breaks, and all that.