The length of a Marathon is about 40 kilometers.
There is no such thing. A marathon is a distance race that is 26.2 miles in length.
A marathon is 26.2 miles in length.
A marathon is 26 miles and 385 yards. In kilometers the distance of a marathon is 42.19. The marathon is an Olympic event.
A Marathon race is about 26.2 miles (42.195 kilometers)
26.2 miles is 42.16 kilometers.