John walking at 4 Kmph reaches his office 8 minutes late. If he walks at 6 Kmph, he reaches there 10 minutes earlier. How far is the office from his house?	Pick:
A) 3 2/5 Km	B) 3 3/5 Km	C) 4 1/5 Km	D) 5 1/5 Km	E) None
Formula = S1*S2/S2-S1 * T1+T2/60   = 4*6/2 * 18/6   = 24/2 * 18/60   = 18/5 = 3 3/5 Km   3 3/5 Km
<result>B</result>
John walking at 4 Kmph reaches his office 8 minutes late. If he walks at 6 Kmph, he reaches there 10 minutes earlier. How far is the office from his house?