SOLUTION: Luigi rides his bike to school and forgets his lunch. 10 min after he leaves the house, his mother starts to drive after him in her car. The car travels 22 mph and the bike travel

Algebra ->  Length-and-distance -> SOLUTION: Luigi rides his bike to school and forgets his lunch. 10 min after he leaves the house, his mother starts to drive after him in her car. The car travels 22 mph and the bike travel      Log On


   

Question 1085194: Luigi rides his bike to school and forgets his lunch. 10 min after he leaves the house, his
mother starts to drive after him in her car. The car travels 22 mph and the bike travels 12 mph.
How long until the mother catches up?
Found 2 solutions by ikleyn, Alan3354:
Answer by ikleyn(52775) About Me  (Show Source):
You can put this solution on YOUR website!
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Let t = "How long until the mother catches up".

Then  t = %28%2810%2A%2812%2F60%29%29%29%2F%28%28%2822-10%29%2F60%29%29.


The numerator %2810%2A%2812%2F60%29%29 is the distance between them when mother started move.


The denominator is their relative speed, in miles per minute.


So, t = %2810%2A12%29%2F12 = 10 minutes.

On catching up problems see the lesson
    - Travel and Distance problems for two bodies moving in the same direction (catching up)
in this site.


Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Don't follow with his lunch.
Teach him to wake up, and not forget it again.
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He needs to lose some weight, anyway.