Problema Solution
two girls on bicycles start from the same place but travel in opposite direction. Carla bikes twice as fast as Dindi. If in 4 hours they are 36 kilometers apart, what is the rate of speed of each girl?
Answer provided by our tutors
Let
v = the rate of Dindi
2v = the rate of Carla
t = 4 hr the time of the travel
d = 36 km the distance between
Since distance = speed*time and the girls are traveling in opposite direction we have:
vt + 2vt = d
4v + 4*2v = 36
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click here to see the equation solved for v
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v = 3 km/h
2v = 2*3 = 6 km/h
Dindi's rate is 3 km/h while Carla's rate is 6 km/h.