SOLUTION: Dad drove the jet ski at 40 mph for 2 hours against the current and 1 hour with the current. How fast was he traveling in still water. Round your answer to the nearest mph.

Question 756355: Dad drove the jet ski at 40 mph for 2 hours against the current and 1 hour with the current. How fast was he traveling in still water. Round your answer to the nearest mph.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Dad drove the jet ski at 40 mph for 2 hours against the current and 1 hour with the current. How fast was he traveling in still water.----
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Against DATA: time = 2 hrs ; rate = 40 mph ; distance = rt = 80 miles
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With DATA::: time = 1 hr ; distance = 80 miles ; rate = d/t = 80 mph
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Equations:
With Eq::: b + c = 80 mph
Against::: b - c = 40
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Add to solve for "b":
2b = 120
boat speed in still water = 60 mph
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cheers,
Stan H.
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