Question

a bus travels 200km at a speed of 100 km/h and return with a speed of 50km/h calculate the average speed for the whole journey​

Answer 1

The Average Speed is

$\frac{2 \times 100 \times 50}{100 + 50} \\ = \frac{100 \times 100}{150} \\ = 66.67m {s}^ - {2}$