Please solve this

Question

A jet left Tokyo and flew toward Moscow.An Air Force Jet left one hour later flying 35 Kph faster in an effort to reach it. After 10 hours the Air Force jet reached it. Find the jets average speed

Answer 1

fast jet goes 35 mph faster

and leaves 1 hour later, catching up to slower jet in 10 hours

what are the speeds of each?

slower = s speed

faster = f speed

(35+s)10 = 11s

s = 350 mph

f = 385 mph