SOLUTION: siam can mow a lawn in 60 minutes. larry can mow the same lawn in 30 minutes . How long does it take for both Siam and Larry to mow the lawn if they are working together

Algebra ->  Rate-of-work-word-problems -> SOLUTION: siam can mow a lawn in 60 minutes. larry can mow the same lawn in 30 minutes . How long does it take for both Siam and Larry to mow the lawn if they are working together      Log On


   

Question 1139611: siam can mow a lawn in 60 minutes. larry can mow the same lawn in 30 minutes . How long does it take for both Siam and Larry to mow the lawn if they are working together
Found 2 solutions by josmiceli, Alan3354:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Add their rates of working to
get their rate working together
Let +t+ = their time working together
+1%2F60+%2B+1%2F30+=+1%2Ft+
Multiply both sides by +60t+
+t+%2B+2t+=+60+
+3t+=+60+
+t+=+20+
Working together it takes
them 20 min

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
siam can mow a lawn in 60 minutes. larry can mow the same lawn in 30 minutes . How long does it take for both Siam and Larry to mow the lawn if they are working together
===========
Larry mows 2x as fast at siam.
---> Larry + siam mow as fast as 3 Larrys.
----
60/3 = 20 minutes.