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Find the speed
★★★Speed = distance ÷ time: 120 km in 2 hours is 60 km/h.
Ratio Galaxy · Learn first
Example
180 km in 3 hours. What is the speed in km per hour?
180 km ÷ 3 h
Answer: 60 km/h
Speed · Measurement
Use distance = speed × time to find any one of the three.
Speed = distance ÷ time: 120 km in 2 hours is 60 km/h.
This is step 1 of unit 8, “Speed”, in Stage 7: Dividing fractions and decimals, ratio and percent, circles and volume (ages 13). A round has 10 problems; 90% or better earns three stars. Everything is free with no sign-up, and your stars and XP are saved on this device.