Answer: Rachel can run 6.4 miles in 48 minutes.
Explanation:
Find the unit rate miles per minute then multiply by the minutes
4/30 = 1/7.5 One mile in 7.5 minutes. (Fraction equivalent 2/15)
2/15 × 48 = 6.4 miles
We can also use a ratio to solve:
4/30 = x/48 . cross multiply
4×48 = 30x
192 = 30x . Divide both sides by 30
192/30 = x
6.4 = x