Multiple choice

In one hour a boat goes13 km along the stream and 7 km aganist the stream.The speed of the boat in still water (in km/hr)is- एक घंटे में धारा के साथ एक नाव 13 किमी और धारा के विपरीत 7 किमी जाती है |नाव की गति शांत जल (किमी / घंटा) में है-

  1. 3

  2. 8

  3. 10

  4. 6
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Downstream speed (with stream) = 13 km/hr, upstream (against) = 7 km/hr. Still water speed = (downstream + upstream)/2 = (13+7)/2 = 10 km/hr. Stream speed = (downstream - upstream)/2 = 3 km/hr. Answer C is correct.

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