Two people P Q start a race in a circular track in opposite way different but constant speed. First they meet 900m cw from the starting pt. Then they meet 800m ccw from the starting pt. What's the circumference of the circle.  Pick one:  A) 2600  B) 2700  C) 2800  D) 2900  E) 2500
when they first met 900m cw from the starting pt.   second time, they will meet at 1800 m cw from starting point which is 800 m CCW from starting point.   so circumference of circle = 1800+800= 
<gadget id="calculator">1800+800</gadget>
<output>2_600</output>
2600 m   2600NSWER:2600
<result>A</result>
Two people P Q start a race in a circular track in opposite way different but constant speed. First they meet 900m cw from the starting pt. Then they meet 800m ccw from the starting pt. What's the circumference of the circle.