The length of a metallic rod is 6 m 3 cm long. Raeann cut the metallic rod into 3 pieces. The length of the first piece of the metallic rod is 51 cm. The length of the second piece of the metallic rod is 4 m shorter than the third piece. What is the length of the third piece of metallic rod?
1 m = 100 cm

Difference in the length between the second and the third piece
= 4 m
= 4 x 100
= 400 cm

Length of a metallic rod
= 6 m 3 cm
= 6 x 100 + 3
= 603 cm

Length of the first piece = 51 cm
Length of the second piece = 1 u
Length of the third piece = 1 u + 400 cm

1 u + 1 u + 400 + 51 = 603
2 u + 451 = 603
2 u = 603 - 451 = 152
1 u = 152 ÷ 2 = 76 

Length of the third piece of metallic rod
= 1 u + 400
= 76 + 400
= 476 cm

Answer(s): 476 cm