Two persons start at the same point, walk in opposite directions with 6 km/hr and 7 km/hr respectively.
What is the distance separated after 3 and half hrs?  Choose the correct choice from the following options.
A) 45.5 km
B) 27.250 km
C) 28.250 km
D) 29.250 km
E) 25.250 km

Rationale: as the two persons are moving in the opposite direction , so they will be separateed in 1 hour = 6 + 7 = 13 km . they will be separated in 2.5 hours = 13 * 3.5 = 45.5 km answer : a
Answer: A