Two men A and B start from place X walking at 4 Â½ kmph and 5 Â¾ kmph respectively. How many km apart they are at the end of 3 Â½ hours if they are walking in the same direction ?  Choose the most appropriate option:  A) 1 3/8 km  B) 3 3/8 km  C) 5 3/8 km  D) 4 3/8 km  E) 7 3/8 km
Explanation:   Relative Speed = 5 Â¾ - 4 Â½ = 1 Â¼   Time = 3 Â½ h.   Distance = 5/4 x 7/2 = 35/8 = 4 3/8 km.   Answer: 4 3/8 km
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Two men A and B start from place X walking at 4 Â½ kmph and 5 Â¾ kmph respectively. How many km apart they are at the end of 3 Â½ hours if they are walking in the same direction ?