1.

A boat whose speed is 12.5 Km/hr travel 60 km and come back and take total of 10 hr. what is speed of the stream.1. 5 Km/hr2. 3 Km/hr3. 2.5 Km/hr4. 5.2 Km/hr5. 4.5 Km/hr

Answer» Correct Answer - Option 3 : 2.5 Km/hr

Calculation:

Let the speed of stream be x

So, according to question

\(\frac{{60}}{{12.5\; + \;x}} + \frac{{60}}{{12.5 - x}} = 10\)

Solving it further

⇒ We get x = 2.5 km/hr



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