“一个半小时”可不可以说成one and half an hour?

题目

“一个半小时”可不可以说成one and half an hour?
可以说one and a half hour 或one hour and a half,那可不可以说one and half an hour呢?
为什么？

答案

上面有东西打错了
应该是one and a half hours=one hour and a half.