Two men A and B start from place X walking at 4 ½ kmph and 5 ¾ kmph respectively. How many km apart they are at the end of 3 ½ hours if they are walking in the same direction?  Select the correct option:	A) 7 3/8 km	B) 5 7/8 km	C) 17 7/8 km	D) 7 7/8 km	E) 2 7/8 km
RS = 6 ¾ - 4 ½ = 2 ¼   T = 3 ½ h.   7 7/8 km = 9/4 * 7/2 = 63/8 = 7 7/8 km   ANSWER:7 7/8 km
<result>D</result>
Two men A and B start from place X walking at 4 ½ kmph and 5 ¾ kmph respectively. How many km apart they are at the end of 3 ½ hours if they are walking in the same direction?