60- 10- 10=40 cm

60 * 40 *10 =24,000 cubic centimeters =24 cubic decimeters = 24 liters

Let the distance be x kilometers.

2x(x/2+x/6)

=2x÷2x/3

=3 km

Let * * * have x kilograms of watermelon.

1/8x+ 1/8x+45 = 5/ 16x

5/ 16x- 1/4x=45

1/ 16x=45

x= 720