SOLUTION: mohan can mow a piece of land in 4hrs. Kumar can mow it in 3hrs. Mohan can started mowing lawn all by himself and an hour later kumar joined with him together they finished mowing

Question 72534: mohan can mow a piece of land in 4hrs. Kumar can mow it in 3hrs. Mohan can started mowing lawn all by himself and an hour later kumar joined with him together they finished mowing the lawn in total? Howlong did it take to move the lawn?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
mohan can mow a piece of land in 4 hrs. Kumar can mow it in 3 hrs. Mohan can started mowing lawn all by himself and an hour later kumar joined with him together they finished mowing the lawn in total? How long did it take to mow the lawn?
:
We know that it takes Mohair 4 hrs to complete the job,
so after 1 hr, 1/4 of the job is done, right?
;
Let x = the time required when they work together on the remaining 3/4
Let the completed job = 1
:
= 1
:
Multiply equation by 12 and you have:
3 + 3x + 4x = 12
:
7x = 12 - 3
:
7x = 9
:
x = 9/7 hrs
:
1 & 2/7 hrs or about 1 hr 17 minutes,
Include Mohair's 1 hr alone and it's 2 hrs 17 min
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