SOLUTION: Sam can mow a lawn in 80 minutes. Bullwinkle can mow the same lawn in 120 minutes. How long does it take for both Sam and Bullwinkle to mow the lawn if they are working together? E

Question 1147776: Sam can mow a lawn in 80 minutes. Bullwinkle can mow the same lawn in 120 minutes. How long does it take for both Sam and Bullwinkle to mow the lawn if they are working together? Express your answer as a reduced fraction
Found 2 solutions by ankor@dixie-net.com, Alan3354:
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Sam can mow a lawn in 80 minutes.
Bullwinkle can mow the same lawn in 120 minutes.
How long does it take for both Sam and Bullwinkle to mow the lawn if they are working together?
Express your answer as a reduced fraction
:
Assuming they have two lawn mowers
let t = time when working together
let the completed job = 1
Each will do a fraction of the job. the two fractions add up to 1
+ = 1
multiply by 240, to get rid of the fractions
240* + 240* = 240(1)
Cancel the fractions
3t + 2t = 240
5t = 240
t = 240/5
t = 48 minutes when working together
:
:
Check this out
+ = 1
+ = 1

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Sam can mow a lawn in 80 minutes. Bullwinkle can mow the same lawn in 120 minutes. How long does it take for both Sam and Bullwinkle to mow the lawn if they are working together? Express your answer as a reduced fraction
=================
80*120/(80+120) = 9600/200 = 48 minutes
RELATED QUESTIONS
Sam can mow a lawn in 30 minutes. Melissa can mow the same lawn in 90 minutes. How long... (answered by Boreal,greenestamps,Alan3354)
Fred can mow a lawn in 120 minutes. Rocky can mow the same lawn in 80 minutes. How long... (answered by josmiceli)
Betty can mow a lawn in 40 minutes. Melissa can mow the same lawn in 20 minutes. How long (answered by Edwin McCravy)
siam can mow a lawn in 60 minutes. larry can mow the same lawn in 30 minutes . How long (answered by josmiceli,Alan3354)
Sam and Dave can mow the lawn in 60 minutes if they work together. If Dave works twice as (answered by jim_thompson5910)
Peter can mow a lawn in 40 minutes. John can mow the same lawn in 60 minutes. How long... (answered by ikleyn,josgarithmetic,math_tutor2020,greenestamps)
Sam can mow the lawn in 20 minutes. Bob can mow the lawn in 30 minutes. if they work... (answered by vertciel,ayshia)
sam can mow a lawn in 6hrs, and Jim can mow the same lawn in 4hrs. How long will it take... (answered by scott8148)
Mowing a lawn. Adam can mow a lawn in 40 minutes, while his cousin Victor can mow the... (answered by richwmiller)