Hey, i need some serious with this math question! joe can more 6 acres in 5 hours. sara can do the same job in 4 hours because she has a wide lawnmower. if they work together at their normal rate of work, how long will it the them too finis? i need setting up the problem and then solving !

So Joe can mow the 6 acres in 5 hours, whilst Sara can do it in only 4 hours.  So in after 1 hour of working, Joe has only done 1/5 of the whole thing, and after working for 1 hour as well, Sara has however done 1/4 of the whole job.

let's say they both work together and do it in "t" hours.

now, after one hour has passed, Joe has done 1/5 of the whole thing, and Sara has done 1/4 of it, and since the job took "t" hours, after 1 hour it has only being done 1/t thus far, thus



which is 2 hours 13 minutes and about 20 seconds.