A car accelerates and travels 300 meters in the first minute. From the second minute, it will travel 50 meters more than the previous minute. According to this calculation, when the speed of the car reaches 1200 meters per minute , how many minutes did the car drive in total?
一辆汽车作加速运动，在第1分钟内行驶了300米，从第2分钟开始，每分钟都要比前一分钟多行驶50米，照这样计算，当汽车的速度达到每分钟1200米时，这辆汽车一共行驶了多少分钟？
<gadget id="calculator">1_200 - 300</gadget>
<output>900</output>

<gadget id="calculator">900 / 50</gadget>
<output>18</output>

<gadget id="calculator">18 + 1</gadget>
<output>19</output>

<result>19</result>