Problema Solution
Shawna left the science museum and
traveled toward her friend's house. One
hour later Lisa left traveling 10 mph faster
in an effort to catch up to her. After two
hours Lisa finally caught up. What was
Shawna's average speed?
Answer provided by our tutors
Let
v = Shawna's average speed
v + 10 = Lisa's average speed
Since distance = speed*time and they both traveled the same distance we have:
(2 + 1)v = 2*(v + 10)
........
click here to see the equation solved for v
........
v = 20 mph
Shawna's average speed was 20 mph.