Steve skated 12 kilometers in 52 minutes. Then he turned around and took the same path back to his starting point, arriving 3 hours and 24 minutes later. What was his average speed during his trip?

Mathematics · Middle School · Tue Nov 03 2020

Answered on

Given:

Distance: 12 kilometers

Time 1 = 52 minutes

Time 2 = 3 hours and 24 minutes

Determine the average speed during the trip.

Formula for average velocity:

Vave = change in distance/change in time

Solution:

Convert first Time 2 in minutes and distance into km for us to be able to have a consistent answer.

3 hours and 24 minutes = 204 minutes

12 km = 12000 m

Thus we will express our answers in m per minute

Substitute the given values in the formula for average velocity.

Vave = 12000m/ (204 minutes - 52 minutes)

Vave = 12000m/ 152 min

Vave = 78.94 m/min

Final answer:

Vave = 78.94 m/min