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  1. A man rows upstream 36 km and downstream 48 km taking 6 hours each time. The speed of the current is
    1. 0.5 kmph
    2. 2 kmph
    3. 1 kmph
    4. 1.5 kmph
Correct Option: C

As per the given in above question , we have

Rate downstream of boat =
48
= 8 kmph
6

Rate upstream =
36
= 6 kmph
6

∴ Speed of current =
1
(Rate down stream – rate upstream)
2

Speed of current =
1
(8 – 6) = 1 kmph
2

We can find the required answer with the help of given formula :
Here, p =
48
= 8 kmph
6

q =
36
= 6 kmph
6

Speed of Current =
1
(p - q)
2

Speed of Current =
1
(8 - 6) = 1 kmph
2



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