A) 80
B) 180
C) 60
D) 100
Correct Answer: A
Solution :
Let the distance to be covered by the boat when it is travelling against the stream be\[x.\] The boat goes down the river at a speed of (20 + 4) = 24 km/h and up the river at a speed of\[(20-4)=16\,\,km\text{/}h\] Since, the time taken is same\[\frac{120}{24}=\frac{x}{16}\] Therefore, \[x=80\,km\]You need to login to perform this action.
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