Concept explainers
To Find: To find the speed of the current and the speed of the boatfrom the given information.
Answer to Problem 73E
The speed of boat and current is 25 and 5 miles per hour.
Explanation of Solution
Given information:Given distance and time taken by the boat
Formula used: Elimination method
Calculation:
Let the speed of the boat be xmiles /hour and the speed of the current be ymiles /hour.
Speed downstream
But, speed downstream
And, speed upstream
According to question
Subtracting these equations
Also, adding (1) and (2),
Thus, the speed of boat is 25 miles/hour and the speed of current is 5 miles/hour.
Chapter 7 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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