In a paper airplane contest Amanda plane flew 19 ft farther than Darren plane Darren plane flew twice as far ad Rachel plane Rachel plane 20 ft. How far did Amanda plane fly

Start from the last plane.

Rachel's plane flew 20 ft.

Darren's plane flew twice as far as Rachel's,

so Darren's plane flew 2 * 20 ft = 40 ft.

Amanda's plane flew 19 ft farther than Darren's,

so Amanda's plane flew 40 ft + 19 ft = 59 ft.