SOLUTION: Boris can jog to work in 2/3 of an hour. When he rides his bike, it takes him 1/4 of an hour. If he rides 9 miles per hour faster than he jogs, how far away is his work?
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Question 373386: Boris can jog to work in 2/3 of an hour. When he rides his bike, it takes him 1/4 of an hour. If he rides 9 miles per hour faster than he jogs, how far away is his work?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Let j = jogging rate, r = riding rate.
Then , or . Also r = j + 9.
,
, or r = 14.4 miles per hour, his riding rate.
j = 5.4 miles per hour, his jogging rate.
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