Explanation:
We have,
30 miles : 1.5 hours : : x : 4 hours
To find, the value of x = ?
∴ 1.5 × x = 30 × 4
⇒ 1.5x = 120
⇒ x = [tex]\dfrac{120}{1.5}[/tex]
⇒ x = [tex]\dfrac{1200}{15}[/tex]
⇒ x = 80 miles
∴ The value of x = 80 miles
Thus, the number 80 miles of miles the cyclist rides in 4 hours.