Two boats, travelling at 5 km/h and 10 km/h, head directly towards each other. They begin at a distance of 20 km from each other. How far apart are they (in km) one minute before they collide?

  • 11/12
  • 21/6
  • 31/4
  • 41/3
Answer:- 1
Explanation:-

Solution:
In the final minute of collision, the two boats travel 5/60 km and 10/60 km.
As they moves towards each other relative distance covered in 1 minute,
= (1/12)+(1/6) = 1/4 km.

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