Subject
Bank Exam
Topic
AB Bank 2014 (Assistant Officer)
A ferry, when empty, travels twice as fast as when it is full. It travels 20 miles south with a cargo, spends 30 minutes for unloading, and returns to its original port empty in a total of 8 hours, what is the speed of the ferry when it is empty?
A ferry, when empty, travels twice as fast as when it is full. It travels 20 miles south with a cargo, spends 30 minutes for unloading, and returns to its original port empty in a total of 8 hours, what is the speed of the ferry when it is empty?
ক)
8 mphখ)
10 mphগ)
12 mphঘ)
15 mphExplanation
Let, in 1 hours the ferry goes x km when loaded and in 1 " " " " 2x " empty According to question, 20/x + 20/2x = (8-0.5) hours => (40+20)/2x = 7.5 => 60=15x So, x=4 So, ferry goes (2×4)=8 km in 1 hours when it is empty.Related questions
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