Problema Solution
Norachai left Eduardo's house and drove west. Carlos left three hours later driving 48 km/h faster in an effort to catch up to him. After two hours Carlos finally caught up find norachais average speed
Answer provided by our tutors
We will solve this problem assuming we need to find Norachai's average speed.
Let
v = Norachai's average speed
t = the time of the travel of Norachai
v + 48 = Carlose's average speed
t - 3 = the time of the travel of Carlos
After two hours Carlos finally caught up means:
t - 3 = 2
t = 5 hour
Since they both traveled the same distance and distance = speed*time we have:
v*t = (v + 48)(t - 3)
5v = (5 - 3)(v + 48)
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click here to see the equation solved for v
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v = 32 km/h
Norachai's average speed was 32 km/h.