Answer:
The length of the first piece is 6 inches
The length of the second piece is 18 inches
The length of the third piece is 24 inches
Explanation:
First piece is 6 inches
6 x 3 = 18 -- that means the second piece is 18 inches
6 x 4 = 24 -- that means the third piece is 24 inches
6 + 18 + 24 = 48 -- the sum of what all pieces must equal!