If the weight of 12 meters long rod is 13.4 kg. What is the weight of 6 meters long rod ?  Choose one
A) 6.7 kg .
B) 10.8 kg .
C) 12.4 kg .
D) 18.0 kg
E) none

Rationale: "answer ∵ weight of 12 m long rod = 13.4 kg ∴ weight of 1 m long rod = 13.4 / 12 kg ∴ weight of 6 m long rod = 13.4 x 6 / 12 = 6.7 kg option : a"
Answer: A