A person walked for an hour at a speed of 5 km / h, and then rode a bicycle at a speed of 15 km / h
| September 16, 2021 | education
A person walked for an hour at a speed of 5 km / h, and then rode a bicycle at a speed of 15 km / h for an hour. What is the average speed along the way?
To calculate the value of the average speed of the specified person along the entire path, we apply the formula: Vav = (Sп + Sв) / (tп + tв) = (Vп * tп + Vв * tв) / (tп + tв).
Variables: Vп – speed of the specified person on foot (Vп = 5 km / h); tp is the duration of walking (tp = 1 hour); Vв – speed on a bicycle (Vв = 15 km / h); tv – duration of cycling (tv = 1 h).
Calculation: Vav = (5 * 1 + 15 * 1) / (1 + 1) = 10 km / h.
Answer: The average speed of the specified person along the entire journey is 10 km / h.
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