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3 years ago

11

If working together, brothers Tom and Jack can paint a wall in 4 hours, how much time would it take Jack to paint the wall alone

? (1) Jack is painting twice as fast as Tom. (2) If Tom painted twice as fast as he actually does, the brothers would finish the work in 3 hours.

1 answer:

kiruha [24]3 years ago

3 0

T+J=4 hours
x+2x=4 hours
3x=240 minutes
X=80 minutes

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