SOLUTION: solve john can wash and wax his car in 6 hours on his own. if his little brother helps him he can do it in only 2 hours. if johns little brother worked alone how long would it take
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-> SOLUTION: solve john can wash and wax his car in 6 hours on his own. if his little brother helps him he can do it in only 2 hours. if johns little brother worked alone how long would it take
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Question 1005917: solve john can wash and wax his car in 6 hours on his own. if his little brother helps him he can do it in only 2 hours. if johns little brother worked alone how long would it take to wash and wax the car Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! The set up looks like this (let B = little brother's time):
2/6 + 2/B = 1
Multiply by 6B and get
2B + 12 = 6B
12 = 4B
B = 3 hours
