Question

A plane flies round-trip to Philadelphia. If flies to Philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour. If the total trip takes 6.5 hours, how many miles does the plane fly round-trip?

Answer 1

distance = rate * time

you have 2 different speeds and 2 unknown times and 1 distance to philadelphia
d = 220*t1
d = 280*t2
t1 + t2 = 6.5

---> t2 = 6.5 - t1
---> 220t1 = 280t2

--> 220t1 = 280(6.5 -t1)

solve for t1 and plug it back in to find distance "d", total miles round trip is 2*d

Answer 2

thnx:)

Answer 3

yw