CP's and PNR's

[anthos92]

I've just started self studying for the CPL Performance exam.
Would anyone be able to tell me the simplest way to calculate the following CP and PNR questions on a basic electronic calculator to achieve the answers shown in bold?
Any help would be much appreciated.
Cheers,

[galaxy flyer]

Please do a search--many informative threads on the subject

GF

[Arm out the window]

What reference materials have you got? The formulae should be readily available, then you just have to crunch the numbers.

Do you know the H/(O+H) rules, where H is groundspeed coming home and O is groundspeed out?

Distance to CP = total leg distance x H/(O+H). Then you have to convert that to time using groundspeed out.

Time to PNR = endurance x H/(O+H). Then convert to a distance using g/s O.

[anthos92]

Thanks for the help, I was making a vital error with my calculator and almost pulling my hair out trying to work out why I couldn't come up with the right answers.
Thanks,