Question

a car travels 50km in 30 min then 15km in 15min and 35km in 45 min.what is the average speed

Answer 1

50+15+45÷30+15+45
110÷90
1.23 maybe...

Answer 2

total distance =50+15+35=100
total time = 45+15+30=90min
average speed = total distance / total time
100/90
km/min