Question

Myra drove at an average speed of 30 km/hour for 2 hours and then at an average speed of 60 km/hr for the next 2 hours. If she made no stops during the trip and reached her destination in 4 hours, what was her average speed in km per hour TD for the entire trip?​

Answer 1

Explanation:

Let's name first part of distance F and second part S

We can make weighted average equation:

0.3F + 0.6S = 0.5(S + F)

0.1S=0.2F

S/F = 2/1

So first part equal to 1/3 of all time

ans = 1/3