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07 May 2017, 13:44
Kudos
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C
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Difficulty:
35%
(medium)
Question Stats:
71% (01:53) correct
29%
(01:55)
wrong
based on 209
sessions
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Three men are in a canoe on a river that has a downstream current of 6 miles per hour. If the men together can paddle at maximum speed of 14 mph (without the current), then how long will it take them to travel from their camp to the waterfall 24 miles upstream and back?
A. 6 hours
B. 4 hours 20 minutes
C. 4 hours 12 minutes
D. 3 hours 11 minutes
E. 3 hours
A. 6 hours
B. 4 hours 20 minutes
C. 4 hours 12 minutes
D. 3 hours 11 minutes
E. 3 hours
07 May 2017, 14:21
Kudos
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Given:
Men together can paddle at maximum speed of 14 mph
Downstream current of 6 miles per hour.
Distance of camp to the waterfall - 24 miles
Derived from given information:
Cumulative Upstream Speed at which the men can paddle together = 14 - 6 = 8 mph
Cumulative Downstream Speed at which the men can paddle together = 14 + 6 = 20 mph
Time taken to go upstream to the waterfall = 24/8 = 3 hours
Time taken to go downstream from waterfall to camp = 24/20 =6/5 hours = 72 minutes = 1 hour 12 minutes
Total Time = 3 hours + 1 hour 12 minutes = 4 hours 12 minutes
Answer is C. 4 hours 12 minutes
Men together can paddle at maximum speed of 14 mph
Downstream current of 6 miles per hour.
Distance of camp to the waterfall - 24 miles
Derived from given information:
Cumulative Upstream Speed at which the men can paddle together = 14 - 6 = 8 mph
Cumulative Downstream Speed at which the men can paddle together = 14 + 6 = 20 mph
Time taken to go upstream to the waterfall = 24/8 = 3 hours
Time taken to go downstream from waterfall to camp = 24/20 =6/5 hours = 72 minutes = 1 hour 12 minutes
Total Time = 3 hours + 1 hour 12 minutes = 4 hours 12 minutes
Answer is C. 4 hours 12 minutes
22 Dec 2024, 05:27
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