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Option 1 : Quantity I > Quantity II
Given distance = 80 km
Time = 4hr
Let the speed of the stream be S
⇒ Speed of boat = 5S
Quantity I:
80/4 = 5S – S
⇒ 4S = 20
⇒ S = 5 kmph
Y = S + 5S = 30 km/hr
Quantity II: 25 km/hr
∴ Quantity I > Quantity II
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