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Speed Distance Time

Solve d = s × t problems

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.

  1. 1Distance = Speed × Time
  2. 2Speed = Distance / Time
  3. 3Time = Distance / Speed
  4. 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
ActivityTypical SpeedTime to cover 1 km
Walking5 km/h12 min
Running (casual)10 km/h6 min
Running (elite marathon)21 km/h2 min 51s
Cycling (casual)20 km/h3 min
Car (highway)100 km/h36 sec
Commercial flight900 km/h4 sec

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.

References

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