GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Distance / Speed / Time - Explained

The video tutorial explains how to calculate average speed using Ollie's journey from Liverpool to Sheffield as an example. It covers the calculation of total distance and time, and provides a detailed explanation of the average speed formula. The tutorial also analyzes Janie's journey from Barnsley to York, discussing the implications of calculating average speed as the mean of two speeds.

What was the total distance Ollie traveled from Liverpool to Sheffield?

• 130 kilometers

• 61 kilometers

• 56 kilometers

• 117 kilometers

How is average speed generally calculated?

• By dividing the total distance by the total time

• By adding the speeds of each segment

• By multiplying the distance and time

• By subtracting the time from the distance

What was the total time taken for Ollie's journey from Liverpool to Sheffield?

• 0.8 hours

• 2.05 hours

• 1.25 hours

• 3.0 hours

What was Ollie's average speed for his entire journey?

• 50 km/h

• 60 km/h

• 57.07 km/h

• 70 km/h

What assumption is made if Janie's average speed is calculated as the mean of two speeds?

• The journey is completed in one segment

• The speeds of both segments are equal

• The times for both segments are equal

• The distances of both segments are equal

What is the relationship between the distances from Leeds to York and Barnsley to Leeds if Janie's average speed is the mean of the two speeds?

• The distances are equal

• The distance from Leeds to York is twice that from Barnsley to Leeds

• The distance from Leeds to York is half that from Barnsley to Leeds

• The distance from Leeds to York is three-quarters that from Barnsley to Leeds

What was Janie's average speed from Barnsley to Leeds?

• 70 km/h

• 60 km/h

• 80 km/h

• 90 km/h