Someone on a skateboard is traveling 15 miles per hour. How many feet does she travel in 30 seconds? (1 mile = 5280 feet) Choose the correct choice from the following answers
A) 600 ft
B) 660 ft
C) 670 ft
D) 680 ft
E) 700 ft

Rationale: "per second = > 15 * 5280 ft / 60 * 60 = 22 ft 30 seconds = > 22 * 30 = 660 ft answer : b"
Answer: B