# Question #982c2

##### 1 Answer

Jan 12, 2018

Ground level: 28 degrees C.

9000 m: -20 degrees C.

#### Explanation:

Pretty straightforward, since we have altitudes given in multiples of 1500 m.

At 4500 m, our temp has decreased by 3 * 8 degrees C.

Or, 24 deg. C.

So, add this back to your temp at 4500 m (4 degrees) to get 28 degrees C at ground level.

At 9000 m, our temp decreases by a further 3*8 degrees. So subtract 24 from your 4 degrees to get -20 degrees C.

All very plausible real-world temperatures. I can personally testify that it gets REALLY COLD up that high.

GOOD LUCK.