Meters to kilograms conversion

Question

A copper wire has mass 12.5 grams per centimeter of length. Find the mass, in kilograms, of a 10 meter long spool of this wire. Do not round.

Answer 1

12.5 x 10 x 100 = 12500 grams = 12.5 kilograms

1 meter = 100 centimeters

10 m = 1000 cm

1 kilogram = 1000 grams

12.5 g in 1 cm

1250 g in 1 m

12,500 g in 10 m

divide 12,500 by 1000 to get kilograms

12500/1000 = 12.5 kg