SOLUTION: From a point on a river, 2 boats are driven in opposite directions, one at 6mph and the other at 11mph. how many hours till there 51 miles apart>?

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Question 32401: From a point on a river, 2 boats are driven in opposite directions, one at 6mph and the other at 11mph. how many hours till there 51 miles apart>?
Answer by mukhopadhyay(490) About Me  (Show Source):
You can put this solution on YOUR website!
Let the hours be x
Boat driving at 6 mph drives 6x miles in x hours;
Boat driving at 11 mph drives 11x miles in x hours;
Total distance is 51 miles
=> 11x + 6x = 51
=> x = 3
Answer: 3 hours