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Q.
A man rows his boat 60 km downstream and 30 km upstream taking 3 hrs each time. Find the speed of the stream ?
A.
5 kmph
B.
10 kmph
C.
15 kmph
D.
45 kmph
View Answer
Correct choice: A
Explanation:
Speed of the boat downstream s=a/t= 60/3 = 20 kmph Speed of the boat upstream s= d/t = 30/3= 10 kmph Therefore, The speed of the stream = speed of downstream − speed of upstream2 =5 kmph
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