The marathon covers 26 miles, 285 yards. Express this distance in kilometers. (1 km= 0.6214 miles, 1 inch = 2.54 centimeters)
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Conversion gives 42,107 km in total

Explanation:

A marathon covers 26 miles and 285 yards.

If 1 kilometer is 0.6214 miles, then how many kilometers are 26 miles, then:

1 km = 0.6214 miles

X = 26 miles

X = 41,841 km

Now if 1 yard is 36 inches, how many inches is 285 yards?

1 yard = 36 inches

285 yards = X

X = 10260 inches

If an inch is equal to 2.54 cm, how many centimeters are 10260 inches?

1 inch = 2.54 cm

10260 cm = X

X = 26060.4 cm

And 26060.4 cm is 0.260604 km

Finally, the sum of the distance would be:

41.841 km + 0.260604 km = 42.107 km

that's what i got you can count the number of atoms