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?

A.

1
12

B.

1
6

C.

1
4

D.

1
3

• 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.
  (or)
  in one minute both boats can cover = 10+5/60=15/60=1/4
• 7 years agoHelpfull: Yes(0) No(0)