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A jogger can run down a hill five times as fast as she can run up the hill. If a round-trip jog up and down a ?
A jogger can run down a hill five times as fast as she can run up the hill. If a round-trip jog up and down a hill takes one and one-half hours, how long does it take her to descend the hill?
2 Answers
- Dr OctavianLv 61 decade agoFavourite answer
A round trip is 0ne and a half hours, which is 90 mins. If it takes her x minutes to jog down the hill, it must take 5x minutes to jog up it. therefore round trip time = 5x + x = 6x.
So 6x = 90,
so x = 15 mins.
Check: 5 times 15 mins is 75 mins; 75 + 15 = 90.