Answer:
3.6 miles in 90 mins
Explanation:
REMEMBER PROPORTIONS
SO IN THIS CASE THIS IS HOW YOU WRITE IT:

So this means in 50 minutes he covered 2 miles and in 90 minutes she covered x miles.
To find x cross multiply :
2 miles * 90 = 180 and x * 50 = 50x
That means 180 = 50x
Divide both sides by 50:
=

3.6 = x
180 divided by 50 is 3.6 and 50x divided by 50 is x.
THUS HE TRAVELLED 3.6 MILES IN 90 MINUTES.
HOPE IT REALLY HELPED
HAVE A GOOD NIGHT/DAY