SSC CGL 7 06 2019 Shift 2 Paper

Question : 71 of 100

Marks: +1, -0

A boat can cover a distance of 7.2 km downstream and 3.2 km upstream in 2 hours. It can also cover 1.5 km. downstream and 0.6 km upstream in 24 minutes. What is the speed of the boat when going downstream (in km/h)?

6
$4 1/2$
5
$7 1/2$

Validate

Solution:

Let downstream

=x

Upstream

=y

\ {7.2}/{x}+\ {3.2}/{y}=2

.....(i)

\ {1.5}/{x}+\ {0.6}/{y}=\ {24}/{60}

...(ii)
On solving

x=6 ; y=4

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