Two roads form a cross intersection, A goes straight north from 1200 meters south of the intersection, and B goes straight east from the intersection. 10 minutes after A and B set off at the same time, they are at the same distance from the intersection. 100 minutes after departure, the distance between the two people and the intersection is equal again, how many meters away from the intersection at this time?
两条公路成十字交叉型，甲从十字路口南1200米处向北直行，乙从十字路口处向东直行．甲、乙同时出发10分钟后，两人与十字路口的距离相等．出发后100分钟，两人与十字路口的距离再次相等，此时距十字路口多少米？
<gadget id="calculator">100 * 66</gadget>
<output>6_600</output>

<gadget id="calculator">6_600 - 1_200</gadget>
<output>5_400</output>

<result>5_400</result>