Cars A and B are traveling towards each other from two places at the same time. After 4 hours, car A is still 48 kilometers away from the midpoint, and car B is 60 kilometers away from the midpoint. It is known that car A is slower than car B per hour (1/3) , how many kilometers does car B travel per hour?
甲乙两车由两地同时相向而行，4小时后，甲车距中点还差48千米，乙车超过中点60千米，已知甲车比乙车每小时慢(1/3)，乙车每小时行多少千米？
<gadget id="calculator">60 + 48</gadget>
<output>108</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">108 / 4 / (1/3)</gadget>
<output>81</output>

<result>81</result>