In 10 minutes on a bicycle we rode 2,400 meters, then for 1 min we went down a slope of 900 m

In 10 minutes on a bicycle we rode 2,400 meters, then for 1 min we went down a slope of 900 m and after that we rode another 1,200 m in 4 minutes. Calculate the average speed.

Given:

t1 = 10 min

t2 = 1 min

t3 = 4 min

s1 = 2400 m

s2 = 900 m

s3 = 1200m

Find: average speed v.

In order to determine the average speed of movement, you need to divide the entire path that the body has traveled by all the time spent.

Let us write this statement by the formula.

v = (s1 + s2 + s3) / (t1 + t2 + t3).

We present all measurements in the SI system.

t1 = 10 min = 600 s.

t2 = 1 min = 60 s.

t3 = 4 min = 240 s.

Let’s calculate the average speed by substituting the data into the formula.

v = (2400 + 900 + 1200) / (600 + 60 + 240) = 4500/900 = 5 m / s.

Answer: The average speed of a cyclist is 5 m / s.