Ajith and Rana walk around a circular course 115 km in circumference, starting together from the same point. If they walk at speed of 4 and 5 kmph respectively, in the same direction, when will they meet ? Choose the correct choice from the following options:
A) after 20 hours
B) after 115 hours
C) after 115 minutes
D) after 20 minutes
E) after 30 minutes

Rationale: rana is the faster person . he gains 1 km in 1 hour . so rana will gain one complete round over ajith in 115 hours . i . e . they will meet after 115 hours . answer : b
Answer: B