Students from Hope Elementary School went on a spring outing. The school bus went up the mountain at a speed of 36 kilometers per hour. After traveling for 5 hours, it took 1 hour less to go down the mountain than to go up the mountain. How many kilometers per hour do you go downhill?
希望小学的同学去春游，校车上山时速度为每小时36千米，行了5小时，下山比上山少用了1小时．下山时每小时行多少千米？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">36 * (5/4)</gadget>
<output>45</output>

<result>45</result>