Known as "the most difficult railway to build in history", Yiwan Railway took 2 years to build and was officially completed and opened at 10:20 am on December 22, 2010, fulfilling the long-awaited century-old railway dream of Enshi people. If it is 600 kilometers from Enshi to Wuhan, two trains A and B depart from Shien and Wuhan respectively at the same time, and the distance between the two trains is 50 kilometers in 5 hours. It is known that train A travels 60 kilometers per hour, find the speed of train B ．
被誉为"史上最难建的铁路"宜万铁路历时2年建设，于2010年12月22日上午10时20分正式竣工开通，圆了恩施人盼望已久的百年铁路梦．如果恩施至武汉600千米，甲、乙两列火车分别同时从施恩、武汉相对开出，5小时候两车相距50千米，已知甲车每小时行60千米，求乙车的速度．
<gadget id="calculator">600 - 50</gadget>
<output>550</output>

<gadget id="calculator">550 / 5</gadget>
<output>110</output>

<gadget id="calculator">110 - 60</gadget>
<output>50</output>

<gadget id="calculator">600 + 50</gadget>
<output>650</output>

<gadget id="calculator">650 / 5</gadget>
<output>130</output>

<gadget id="calculator">130 - 60</gadget>
<output>70</output>

<result>70</result>