a.
To find: Rowing speed in still water and speed of the current
a.
Answer to Problem 3P
Rowing speed in still water (a) is 7/2 miles per hour
Speed of the current (b) is 3/2 miles per hour
Explanation of Solution
Given:
Row Upstream speed is 2 mi/h
Row Downstream speed is 5 mi/h
Concept Used:
Row Upstream speed means the speed of object and the current (or water flow) is in opposite direction as they are in opposite direction that means their speed will subtract
Row Downstream speed means the speed of object and the current (or water flow) is in same direction as they are in same direction that means their speed will add
Calculation:
Let the rowing speed of object in still water is a
And the speed of current (or water flow) is b
a>b (always true for the numeric questions)
Then, for Upstream:
For downstream:
On adding both the equations:
Put in equation
b.
To explain: The outcome of trying to row upstream
b.
Answer to Problem 3P
We can’t row upstream in these conditions
Explanation of Solution
Given:
Rowing speed in still water (a) is 3 mi/h
Speed of current (b) is 4 mi/h
For upstream:
Hence, we can’t row upstream in these conditions
Chapter 6 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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