1. Given : 1 mile = 8/5 km
⇒ 7.5 miles = 7.5 × value of 1 mile
⇒ 7.5 miles = 7.5 × 8/5 km
⇒ 7.5 miles = 12 km
2. Given : 1m = 1.1 yard
⇒ 600m = 600 × value of 1m
⇒ 600m = 600 × 1.1 yard
⇒ 600m = 660 yards
3. Given : 1 yard = 3 feet
⇒ 1 feet = 1/3 yard
⇒ 730 feet = 730 × value of 1 feet
⇒ 730 feet = 730 × 1/3 yard
⇒ 730 feet = 243.33 yards