After increasing the base of a parallelogram by 2.4 cm, it becomes a trapezoid, and the area increases by 6 cm2, what is the height of the trapezoid in cm?
把一个平行四边形的底增加2.4厘米后，就变成了一个梯形，面积增加6平方厘米，则梯形的高是多少厘米．
<gadget id="calculator">2 / 2.4</gadget>
<output>0.833333</output>

<gadget id="calculator">6 * 0.833333</gadget>
<output>4.999998</output>

<result>4.999998</result>