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// When you formulated/created your problem, you forgot to mention that they started simultaneously . . .
1. Short Physics solution
Their rate of separation is 25 + 35 = 60 km/h,
so the process will take = 2 hours.
2. Long Algebra solution
Write the distance equation
25t + 35t = 120 kilometers
(25 + 35)t = 120
60t = 120
t = 120/60 = 2 hours. ANSWER
Solved in two different ways for your better understanding.
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For simple Travel & Distance problems, see introductory lessons
- Travel and Distance problems
- Travel and Distance problems for two bodies moving in opposite directions
- Travel and Distance problems for two bodies moving in the same direction (catching up)
in this site.
They are written specially for you.
You will find the solutions of many similar problems there.
Read them and learn once and for all from these lessons on how to solve simple Travel and Distance problems.
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