SOLUTION: Town X and Town Y are 220km apart. Sharon left Town X at 08 00 and drove towards Town Y at a speed of 80 km/h. Half an hour later, Michelle started driving from Town Y to Town X. T

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Question 880773: Town X and Town Y are 220km apart. Sharon left Town X at 08 00 and drove towards Town Y at a speed of 80 km/h. Half an hour later, Michelle started driving from Town Y to Town X. They met each other at 09 15.
(a) What was Michelle's average speed?
(b) After passing Michelle, Sharon increased her speed by 10km/h. At what time did she reach Town Y?
Answer by Boyen(12) About Me  (Show Source):
You can put this solution on YOUR website!
First calculate the place Sharon is at at 9 15.
80 km/h over 1 hour and 15 minutes = 100km
Now you know that Michelle rode the other 120km in 45 minutes.
120km in 45 minutes = 160 km/h
So a)Michelle's average speed was 160km/h
for b:
Again first calculate the place sharon is at at 9 15.
80 km/h over 1 hour and 15 minutes = 100km.
Now you know that she will drive the other 120 km at 90 km/h
120 km over 90 km/h = 1 hour and 20 minutes.
1 hour and 20 min + 1 hour and 15 min = 2 hours and 35 minutes.
So b) Sharon reached town Y at 10:35.