If the weight of 13 meters long rod is 23.4 kg. What is the weight of 6 meters long rod ?  Choose the correct choice from the following options:  A) 7.2 kg .  B) 10.8 kg .  C) 12.4 kg .  D) 18.0 kg  E) none

Rationale: "answer ∵ weight of 13 m long rod = 23.4 kg ∴ weight of 1 m long rod = 23.4 / 13 kg ∴ weight of 6 m long rod = 23.4 x 6 / 13 = 10.8 kg option : b"
Answer: B