SOLUTION: A small cooler can cool room 10 degrees in 90 minutes . a larger cooler can cool the room 10 degrees in 60 minutes. how long would it take to cool the room 10 degrees if both cool
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Question 321967: A small cooler can cool room 10 degrees in 90 minutes . a larger cooler can cool the room 10 degrees in 60 minutes. how long would it take to cool the room 10 degrees if both coolers were working ?
a 30 minutes b 36 minutes c 45 minutes d 50 minutes Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! cooling room 10 degrees is on job.
small cooler can do the job in 90 minutes
it will do 1/90th of the job in 1 minute
big cooler can do the same job in 60 minutes
this will do 1/60th of the job in 1 minute.
together they can do 1/60+ 1/90 of the job in 1 minute
3+2 / 180
= 5/180
for 1 job they will take 180/5 minutes
= 36 minutes
