Two cars are traveling towards each other from places A and B, which are 210 kilometers apart. The first car stops for 45 minutes for some reason, and the second car stops for half an hour for refueling. After 3 hours, the two cars meet. It is known that the first car A car is traveling at 40 km/h, find the speed of the second car.
两车分别从相距210千米的甲、乙两地相向而行，第一辆汽车因故停了45分，第二辆汽车因加油停了半小时，经过3小时两车相遇，已知第一辆汽车时速为40千米，求第二辆汽车的时速．
<gadget id="calculator">40 * 0.75</gadget>
<output>30</output>

<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">210 - 120</gadget>
<output>90</output>

<gadget id="calculator">30 + 90</gadget>
<output>120</output>

<gadget id="calculator">3 - 0.5</gadget>
<output>2.5</output>

<gadget id="calculator">120 / 2.5</gadget>
<output>48</output>

<result>48</result>