Question

if a person devides is journeys into 3 equal parts and decides to travel in 3 equal parts at the speed of 40 30 15 km per hour find the average speed during the whole journey

Answer 1

$\frac{40 + 30 + 15}{3}$

$\frac{85}{3}$

$28.33 \: km \: per \: \: hour$