A and B start walking towards each other at 6pm at speed of 6kmph and 4kmph. They were initially 50km apart. At what time do they meet?	Choose the correct choice from the following choices
A) 8 pm
B) 6 pm
C) 11 pm
D) 10 pm
E) 5 pm

Rationale: "time of meeting = distance / relative speed = 50 / 4 + 6 = 50 / 10 = 5 hrs after 6 pm = 11 pm answer is c"
Answer: C