Question

John and Melanie are designing a science experiment for the school science fair. Their experiment requires a large amount of copper wire. They need 22 spools of copper wire that each contains 31 meters of wire. How many kilometers of wire do John and Melanie need for their experiment? (Hint: 1 kilometer = 1000 meters)

a) 0.7 kilometers
b) 6.2 kilometers
c) 9.7 kilometers
d) 31 kilometers

Answer 1

John and Melanie need 0.682 kilometers of copper wire for their experiment, which is approximately 0.7 kilometers.

Step-by-step explanation:

To calculate the total length of copper wire needed for John and Melanie's science experiment, we need to multiply the number of spools by the length of wire on each spool.

They require 22 spools, with each spool containing 31 meters of wire. Therefore, the total length in meters can be found by the calculation:

22 spools x 31 meters/spool = 682 meters

Since 1 kilometer equals 1000 meters, we now convert the total length from meters to kilometers:

682 meters / 1000 meters/kilometer = 0.682 kilometers

Therefore, John and Melanie need approximately 0.682 kilometers of copper wire, which can be rounded to 0.7 kilometers when selecting the closest answer option provided.