Concept explainers
To find: the team’s rate in still water and the rate of current.
Answer to Problem 13P
The rate in still water
Explanation of Solution
Given:
A sail boat sails
The return trip upstream takes
Concept used:
In the elimination method:
Either add or subtract equation to get an equation in one variable.
When the coefficients in one variable are opposites then add the equations to eliminate the variable and when the coefficients of one variable are equal and subtract the equation to eliminate a variable.
Calculation:
Let
Using formula:
Dividing both side by
Similarly,
Dividing both side by
Adding the equation
Hence, the rate in still water
Chapter 9 Solutions
Algebra: Structure And Method, Book 1
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