Question
Uncle Ben travelled from City F to City G which was 680 km away. For the first 500 km of the journey, he travelled at a speed of 100 km/h. He then reduced his speed by 40 km/h and completed the rest of the journey. What was his average speed for the whole journey?
4 m

Click button first when a symbol is required. X

Uncle Ben travelled from City F to City G which was 680 km away. For the first 500 km of the journey, he travelled at a speed of 100 km/h. He then reduced his speed by 40 km/h and completed the rest of the journey. What was his average speed for the whole journey?