It means someone has written the question wrongly because it is impossible to measure mass in kilometres.
Chat with our AI personalities
OOM (Order of magnitude) estimate
14.6 kilometers
A paper clip has a mass of about 1 gram. A large baseball bat has a mass of about 1 kilogram. Based on these two examples, 1 gram (the mass of 1 paperclip), and 10 grams (the mass of about 10 paperclips) is far too light. 10 kilograms is equivalent to the mass of 10 large baseball bats, which is far too heavy for the mass of a pair of sneakers, so the best estimate for the mass of a pair of sneakers is 1 kilogram.
1 kg
20 centimeters 1meter 4 decimeters 1 kilometers