When flying an IFR, ATC tell me "DY478, You are 69miles, turn right heading 58, descend and maintain Fl10, Expect vectors for r/w 27L" I descend to this flight level using the default descent rate, -1800fpm. I soon descend to my current level. The atc tell me to descend more so i do, before i know it i'm at 2500ft and about 20miles away from the airport, flying above the tree tops at 2500ft. Of course this dosn't happen in real life. When atc tell me to descend, should i descend at the default -1800fpm or should i descend at like -1300fpm?. Your the experts!
Thanks!
First Officer