Time Distance

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

  1. 1/6
  2. 1/4
  3. 1/3
  4. 1/12

Answer

Relative speed of two boats = 5 + 10 = 15 km/hr

In 60 minutes, they cover (together) = 15 km

In 1 minute, they will cover (together) = 15/60 km = 1/4

The correct option is B.