Question

If one person can mow a lawn in 4 hours, and another person can mow the same lawn in 6 hours, how long will it take them to mow the lawn if they work together?

Answer 1

the key is to figure out how much work each one does in an hour

Answer 2

1/4 and 1/6

Answer 3

very good, then 1/4 + 1/6 is mowed in one hour if they work together

Answer 4

1/4 + 1/6 = 10/24 = 5/12

the neat thing about this is if we flip it over we get the time it takes :)

it takes 12/5 hours to mow it together

Answer 5

Oh, I remember this now! Thanks!

Answer 6

youre welcome; its either that or you hire the 2 gents to mow the yard and record how long it took them ;)