Question

Shivani has two pieces of wire, one 48 feet long and the other 21 feet long. If she wants to cut them up to produce many pieces of wire that are all of the same length, with no wire left over, what is the greatest length, in feet, that she can make them?

Answer 1

3 feet

Explanation:

48 = 2⁴×3

21 = 3×7

Greatest common factor of 48 and 21 is 3.

Each piece will be 3 feet long.