I am just not getting these calculations at all. Can anyone help with the best way of visualising and solving querstions such as:-

The QFF at an airfield in California located 69 metres below sea level is 1030 hPa. The air temperature is 10?C lower than a standard atmosphere. What is the QNH ?

A. More than 1030hPA

B. 1030hPA

C. Less than 1030 hPA

D. Not possible to give an answer

I went with less than 1030 hPA but to be honest I dont really understand how I should go about the answer!!

Can anyone help?

Thanks

D

The QFF at an airfield in California located 69 metres below sea level is 1030 hPa. The air temperature is 10?C lower than a standard atmosphere. What is the QNH ?

A. More than 1030hPA

B. 1030hPA

C. Less than 1030 hPA

D. Not possible to give an answer

I went with less than 1030 hPA but to be honest I dont really understand how I should go about the answer!!

Can anyone help?

Thanks

D

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