How long does it take to travel 210 km at an average speed of 70 km/h?
Correct answer: D. 3 hours
Time = distance ÷ speed = 210 ÷ 70 = 3 hours. Check: 70 km/h for 3 hours covers 210 km. The three forms of the formula are distance = speed × time, speed = distance ÷ time, and time = distance ÷ speed.
easy