Verified answer

Answer:

Let x be the distance.

Then, (x/2)/60 + (x/2)/40 = 10/60

x/120 + x/80 = 1/6

x( 2 + 3)/240 = 1/6

5x/240 = 1/6

x = 240/(6 * 5) = 8 km.

Step-by-step explanation:

Let x be the distance.

Then, (x/2)/60 + (x/2)/40 = 10/60

x/120 + x/80 = 1/6

x( 2 + 3)/240 = 1/6

5x/240 = 1/6

x = 240/(6 * 5) = 8 km.