Question

7. A car travels 5 kilometres up a hill at 10 km/h and back down at 20 km/h. What is the
average speed for the entire trip?​

Answer 1

Uphill : Distance is 5 km, Speed is 10 km/h, Time is 30 minutes.

Down hill: Distance is 5 km, Speed is 20 km/h, Time is 15 minutes

Combined Distance is 10 km, Combined Time is 45 minutes,

Average Speed is 13.333 km/h