Speed, Distance & Time
km
hr
Speed, distance, and time are related by: Distance = Speed × Time. Given any two values, the third can be calculated. Used in travel planning, physics, sports performance analysis, and everyday situations.
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Tip: For unit conversion: 1 m/s = 3.6 km/h. Multiply m/s by 3.6 to get km/h. Conversely: km/h ÷ 3.6 = m/s. A 100m sprinter running 9.58 seconds averages 10.44 m/s = 37.6 km/h.
- 1Distance = Speed × Time
- 2Speed = Distance / Time
- 3Time = Distance / Speed
- 4Ensure units are consistent: if speed is km/h, time must be hours
Speed 60 mph, time 2.5 hours=Distance = 150 miles60 × 2.5 = 150
Distance 400m, time 44 seconds=Speed = 9.09 m/s (32.7 km/h)400/44 = 9.09 m/s
| Activity | Typical Speed | Time to cover 1 km |
|---|---|---|
| Walking | 5 km/h | 12 min |
| Running (casual) | 10 km/h | 6 min |
| Running (elite marathon) | 21 km/h | 2 min 51s |
| Cycling (casual) | 20 km/h | 3 min |
| Car (highway) | 100 km/h | 36 sec |
| Commercial flight | 900 km/h | 4 sec |
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Fun Fact
Light takes about 8.3 minutes to travel from the Sun to Earth (149.6 million km at 299,792 km/s). When you look at the Sun, you're seeing it as it was 8 minutes ago.
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