Problema Solution
Students are traveling in two cars to a football game 140 miles away. The first car leaves on time and travels at an average speed of 40 miles per hour. The second car starts
1/2 hour later and travels at an average speed of 50 miles per hour. How long will it take the second car to catch up to the first car?
Answer provided by our tutors
Let first car starts at t hours.
So, Second car starts at (t-1/2).
40*t=50(t-1/2)
40t=50t-25
-10t=-25
t=2.5 hours.
Time taken by the second car to catch up to the first car=2.5-0.5=2 hours