Find the speed of the stream in Km/h.

A person covers 18 km along the stream in 4 hours and covers the same distance against the stream in 12 hrs. Find the speed of the stream in Km/h.

  1. 1.5
  2. 1.0
  3. 1.75
  4. 3.0
Monis Rasool Professor Asked on 3rd June 2015 in Maths.
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1 Answer(s)

Answer: (4) 3.0
Explanation:-
Distance = 18km
Taken time by a person = 4 hours
Then, the speed of a person = 18/4 = 4.5km/h

Again, time taken by a person = 12h
Then, speed of a person = 18/12 = 1.5km/h

Speed of stream = (4 – 1.5)km/h
= 3.0 hm/h

Hence, the speed of stream is 3.0km/h.

Anurag Mishra Professor Answered on 3rd June 2015.
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