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M: +1.00/-0.25

A boat goes 15 km upstream and 22 km downstream is 5 hours. It goes 20 km upstream and   5 5 2   \ \frac{55}{2}\ km downstream in   1 3 2   \ \frac{13}{2}\ hours. What is the speed (in km/hr) of stream ?

[SSC CPO 4 July 2017 Afternoon Shift With Answers]
A
B
C
D
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