The jogging track in a sports complex is 726 meters in circumference. Deepak and his wife start from the same point and walk in opposite directions at 4.5 km/hr and 3.75 km/hr respectively. They will meet for the first time in?
Choices:  A) 450min  B) 528min  C) 610min  D) 714min  E) 359min
Clearly, the two will meet when they are 726m apart   To be  4.5+3.75= 
<gadget id="calculator"> 4.5+3.75</gadget>
<output>8.25</output>
8.25 km apart, they take 1 hour   To be 726 m apart, they take 100/825 * 726/1000= 242/2750 * 60 = 528 min.   Answer is 528min
<result>B</result>
The jogging track in a sports complex is 726 meters in circumference. Deepak and his wife start from the same point and walk in opposite directions at 4.5 km/hr and 3.75 km/hr respectively. They will meet for the first time in?