The distance between the two places is 112 kilometers. Two people, A and B, ride bicycles and drive toward each other from the two places at the same time. A travels 15 kilometers per hour, and meets B after 3.5 hours. How many kilometers does B ride per hour?
两地相距112千米，甲、乙两人骑自行车同时从两地相向而行，甲每小时行15千米，经过3.5小时后与乙相遇．乙每小时骑行多少千米？
<gadget id="calculator">112 / 3.5</gadget>
<output>32</output>

<gadget id="calculator">32 - 15</gadget>
<output>17</output>

<result>17</result>