Correct Answer - Option 2 : 1.2 kmph
Given:
Distance downstream = 60 km
Distance upstream = 36 km
Time taken = 10 h
Calculations:
Speed downstream = Distance / time = 60/10 = 6 kmph
Speed upstream = Distance / time = 36/10 = 3.6 kmph
∴ velocity of the current = (1/2)(Speed downstream – Speed upstream)
⇒ velocity of the current = (1/2)(6 – 3.6)
⇒ velocity of the current = 2.4/2
⇒ velocity of the current = 1.2 kmph
The velocity of the current is 1.2 kmph.
