The cyclist traveled 40 km at a speed of 20 km / h, and then another 30 km in 3 hours.

The cyclist traveled 40 km at a speed of 20 km / h, and then another 30 km in 3 hours. determine the average speed along the entire path.

To calculate the average speed of a cyclist along the entire path, we will use the formula: Vav. = Stot. / ttot. = (S1 + S2) / (t1 + t2) = (S1 + S2) / (S1 / V1 + t2), where S1 is the first distance traveled (S1 = 40 km); S2 – second distance traveled (S2 = 30 km); V1 – first speed (V1 = 20 km / h); t2 – duration of movement in the second section (t2 = 3 hours).

Let’s calculate: Vav. = (40 + 30) / (40/20 + 3) = 70/5 = 14 km / h.

Answer: The average speed along the entire route was 14 km / h.