math
posted by angie .
joe left a campsite on a trip down the river in a canoe, traveling a 6 km/h. four hours later, joe's father set out after him in a motorboat. The motrboat traveled at 30 km/h. how long after joe's father started did he overtake the canoe? how far had joe traveled down the river when his father overtook him?

math 
Reiny
Can you set it up the same way, I just showed you in the train question?
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