Subject
Quantitative Aptitude
Topic
Speed & Distance
A boat covers a certain distance downstream in 1 hour, while it comes back in 1x(1/2) hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?
A boat covers a certain distance downstream in 1 hour, while it comes back in 1x(1/2) hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?
ক)
12 kmphখ)
13 kmphগ)
14 kmphঘ)
15 kmphExplanation
Let the speed of the boat in still water be x kmph. Then, Speed downstream = (x+3) kmph, Speed upstream = (x-3) kmph. So, (x+3) x 1 = (x-3) x 3/2 => 2x+6 = 3x – 9 => x = 15 kmphRelated questions
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