Two people, A and B, walk toward each other from AB. A walks 10 kilometers per hour, and B walks 15 kilometers per hour. After 6 hours, the distance between A and B is exactly 25% of the total length. Find the length of AB How many kilometers? (write all possibilities)
甲乙二人从AB两地相向而行，甲每小时走10千米，乙每小时走15千米，6小时后甲乙二人相距的长度，正好是全长的25%，求AB两地长多少千米？(写出所有可能)
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>