SOLUTION: An experienced worker can unload a truck in one hour forty minutes. When he works together with a trainee, they can unload the truck in one hour. How long would the trainee need to
Algebra.Com
Question 748790: An experienced worker can unload a truck in one hour forty minutes. When he works together with a trainee, they can unload the truck in one hour. How long would the trainee need to unload the truck if he works alone?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
An experienced worker can unload a truck in one hour forty minutes. When he works together with a trainee, they can unload the truck in one hour. How long would the trainee need to unload the truck if he works alone?
-----
exp worker rate = 1/100 job/min
together worker rate = 1/60 job/min
trainee worker rate = 1/x job/min
===============================================
Equation:
rate + rate = together rate
1/100 + 1/x = 1/60
-----
Multiply thru by 100*60x to get:
-----------------------------------
60x + (100*60) = 100x
-------
40x = 6000
x = 150 minutes (time for the trainee to do the job alone)
================
Cheers,
Stan H.
==================
RELATED QUESTIONS
Jake can unload a delivery truck in 40 minutes, and Jennie can unload the same truck in... (answered by josgarithmetic)
Kim can unload a delivery truck in 20 minutes and Rom can do it in 35 mins. If they work... (answered by ptaylor)
Julissa can unload a ship’s cargo twice as fast as Chris. Together, they can unload the... (answered by ewatrrr,jrfrunner)
Two cranes, operating together, can unload a cargo ship in 4 hours. If it takes one crane (answered by Mathtut,solver91311)
25 men can unload a truck in 2 hours.how many hours should it take 15 men to unload the... (answered by Edwin McCravy)
an experienced surveyor can survey a certain tract of land in 3 hours. a trainee takes... (answered by richwmiller)
1.Eight workers can paint an entire house in ten hours. How long would it take five... (answered by stanbon)
Crane A can unload the dumpster in 10 hours, and Crane B CAN UNLOAD it in 14 hours. Crane (answered by ptaylor)
An experienced worker can paint a room three times faster than her apprentice can.... (answered by jorel1380)