Rajasthan Police Constable Model Paper 2

To find: Speed of stream =?
Statement I
Downstream to upstream = 19 ∶ 13
Statement II
Now, 182/Upstream + 114/Downstream = 10
⇒ (182/13x) + (114/19x) = 10
⇒ 14 + 6 = 10x
⇒ x = 2
Downstream = 38 kmph
Upstream = 26 kmph
Speed of stream = (Downstream - Upstream)/2 = 6kmph
Thus, both statement I and II are necessary to find the required value.