How many grams does one meter of wire weigh?

Question

Electricians use copper wire when wiring a house. A length of wire that is 1 2/3 meters weighs 15 grams. How many grams does one meter of wire weigh?

Answer 1

Work this as a proportion.

 

1 2/3 meters = 5/3 meters

 

(5/3 meters)/(15 grams) = (1 meter)/(x grams)

 

(5/3)/15 = 1/x

 

x = 15/(5/3) = 9 grams

Answer 2

This is a proportion problem.

 

(5/3)/15 = 1/x  => 5/45 = 1/x => x = 9