Question

A plane traveling from Chicago to Boston with a tailwind of 10 miles per hour takes 4 hours. The return trip in the same wind, which is now a headwind, takes the same plane 4 hours and 9 minutes. According to this problem, about how far is it from Chicago to Boston?
1800 miles
2000 miles
2200 miles
2500 miles

Answer 1

If the plane's speed is s, then since distance = speed * time,

4(s+10) = 4.15(s-10)
That gives s=543.33

553.33*4 = 2213
533.33*4.15 = 2213

Answer 2

thanks steve