Question

Ayaan travels 90 miles at an average speed of 60mph.
She then travels a further 40 miles.
The average speed for the entire journey is 59mph.
Assuming Ayaan didn’t stop, what was her average speed for the final 40 miles to 2dp?

Answer 1

average speed is total distance/totaltime and
time=distance/speed, so
(90+40)/(90/60 + x) = 59
x is the time for the last 40 mi, so 40/x is the speed.