The jogging track in a sports complex is 640 m in circumference. Lata and Geeta start from the same point and walk in opposite directions at 4.2 km/hr and 3.8 km/hr respectively. They will meet for the first time in?	Select:
A) 2.9 min
B) 3.9 min
C) 4.2 min
D) 4.8 min
E) 5.6 min
Clearly, the two will meet when they are 640 m apart.   To be (4.2 + 3.8)= 
<gadget id="calculator">(4.2 + 3.8)</gadget>
<output>8</output>
8.0 km apart, they take 1 hour.That is 60 min.   To be 640 m apart, they take    (640/8000 * 60)= 
<gadget id="calculator"> (640/8000 * 60)</gadget>
<output>24/5 = around 4.8</output>
4.8 min.   Answer: 4.8 min
<result>D</result>
The jogging track in a sports complex is 640 m in circumference. Lata and Geeta start from the same point and walk in opposite directions at 4.2 km/hr and 3.8 km/hr respectively. They will meet for the first time in?