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Boats and Streams question bank (Quantitative Aptitude)

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Q1.

$A$ man moves $20 \, km$ downstream in $5 \, hours$ and $10 \, km$ upstream in the same time. The speed of the stream is...........$km/h$.

(A)
$4$
(B)
$1$
(C)
$1.6$
(D)
$2$
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Q2.

$A$ boat travels $18 \, km$ upstream in $6 \, hours$. How long (in $hours$) will it take to cover the same distance downstream if the speed of the current is one-fourth the speed of the boat in still water?

(A)
$3$
(B)
$4$
(C)
$3.6$
(D)
$3.4$
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