Subject
Bank Exam
Topic
SBAC Bank Ltd. MTO 2014
A man rowed 3 miles upstream in 90 minutes. If the river flowed with a current of 2 miles per hour, how long did the man's return trip take?
A man rowed 3 miles upstream in 90 minutes. If the river flowed with a current of 2 miles per hour, how long did the man's return trip take?
ক)
30 minখ)
60 minগ)
90 minঘ)
120 minExplanation
The boat travels upstream in 90 minutes = 3 miles The boat travels upstream in 60 minutes = 3*60/90 miles = 2 miles Thus, Speed of Boat - Speed of Current = Upstream Speed of boat or, Speed of Boat - 2 = 2 or, Speed of Boat = 2+2 or, Speed of Boat = 4 miles/hour Now, Upon Returning, The Boat travels Downstream, Whereas, Downstream speed of Boat = Speed of Boat + Speed of Current &nRelated questions
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