Question

A car completes a journey in 10 minutes. For the first half of the
distance the speed was 60 km/h and for the second half the speed
was 40 km/h. How far is the journey?​

Answer 1

..

Let the total distance be x.

(x/2)/60 + (x/2)/40 = (10minutes)/(60minutes/hour)

x/120+x/80 = 1/6

multiply by common denominator 240

2x+3x = 40

5x=40

x=8 km