speed of jet in still air ---- x mph
speed of wind ---- y mph
4(x+y) = 1008 ---> x+y = 252
4(x-y) = 832 ----> x-y = 208
add them: 2x = 460
x = 230
from x+y = 252 , y = 22
A small jet can fly 1008 miles in
4 hours with a tailwind but only 832 miles in 4 hours into a headwind. Find the speed of the jet in still air.
1 answer
1 answer