SSC CHSL 4 Aug 2021 Shift 1 Paper

Section: Quantitative Aptitude

Question : 58 of 100

Marks: +1, -0

A boat can travel with a speed of

19 {km} \/ {h}

in still water. If the speed of the stream is

3 {km} \/ {h}

, then what will be the total time (in hours) taken by the boat to go

88 {km}

downstream and

24 {km}

upstream?

Solution:

Given, speed of boat in still water

=19 {km} \/ {h}

Speed of stream

=3 {km} \/ {h}

downstream speed

=19+3=22 {km} \/ {h}

Upstream speed

=19-3=16 {km} \/ {h}

According to the question,

∴ \;\text " Required time "\; \;\; =\;{24}/{16}+\;{88}/{22}

\{ ∵ \;\text " time "\;=\;{\;\text " distance "\;}/{\;\text " speed "\;}\}

\;\; =1.5+4=5.5 {h}

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