Concept explainers
The time at which you catch up the friend.
Answer to Problem 35E
The relevant solution is t = 18
Explanation of Solution
Given information:
Formula used:
Substitution method is used.
Calculation:
Given: t is time (in seconds) and d is the distance from fence. We need to find t such that d is same for me and my friend i.e.
OR
To solve graphically, we can write the above equations as following systems of equations:
System 1:
System 2:
Solving graphically System 1:
The point of intersection is (30, -50). Thus, solution corresponding to first equation is t = 30.
Solving graphically System 2:
The point of intersection is (18, 10), Thus, solution corresponding to first equation is t = 18.
Since, time taken is less in case of system 2, the relevant solution is t = 18.
Thus, I catch up with my friend at t = 18 seconds.
Conclusion:
The relevant solution is t = 18
Chapter 5 Solutions
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