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 answer
A) 8pm	B) 6pm	C) 11pm	D) 10pm	E) 5pm
Time of meeting = distance / relative speed = 50/4+6 = 50/10= 
<gadget id="calculator">50/10</gadget>
<output>5</output>
5 hrs after 6pm= 11pm   Answer is 11pm
<result>C</result>
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?