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?

Question

amistre64 · Answer

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

anonymous · Answer

1/4 and 1/6

amistre64 · Answer

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

amistre64 · Answer

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

anonymous · Answer

Oh, I remember this now! Thanks!

amistre64 · Answer

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