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Speed, distance & time formulas
12 formulas for Speed, distance & time, from the Arithmetic & Quantitative Aptitude section of the Quantix formula library. Tap 🧮 next to a formula to solve it for any variable with step-by-step working.
| Name | Formula | Note |
|---|---|---|
| Basic | Distance = Speed × Time | |
| Unit conversion | 1 km/h = 5/18 m/s; 1 m/s = 18/5 km/h | |
| Average speed (equal distances) | 2xy / (x + y) | |
| Relative speed — same direction | |u − v| | |
| Relative speed — opposite directions | u + v | |
| Train crossing a pole | Time = Length of train / Speed | |
| Train crossing platform | Time = (L_train + L_platform) / Speed | |
| Boat downstream | u + v | u boat speed, v stream speed |
| Boat upstream | u − v | |
| Boat speed in still water | (Downstream + Upstream) / 2 | |
| Stream speed | (Downstream − Upstream) / 2 | |
| Meeting after start | Time = Distance / (u + v) |
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