The shipping route between the two seaports is 1200 kilometers. Boats A and B depart from the two ports at the same time, and the distance between them is still 48 kilometers after 12 hours. It is known that boat A travels 47 kilometers per hour, how many kilometers per hour does boat B travel?
两个海港之间的航路为1200千米，甲、乙两艇同时从两港相对开出，12小时后还相距48千米．已知甲艇每小时行47千米，乙艇每小时行多少千米？
<gadget id="calculator">1_200 - 48</gadget>
<output>1_152</output>

<gadget id="calculator">1_152 / 12</gadget>
<output>96</output>

<gadget id="calculator">96 - 47</gadget>
<output>49</output>

<result>49</result>