If the weight of 12 meters long rod is 12.2 kg. What is the weight of 6 meters long rod ?	Select.
A) 7.2 kg.  B) 10.8 kg.  C) 12.4 kg.  D) 6.1 kg  E) None
Answer   ∵Weight of 12 m long rod = 12.2 kg   ∴ Weight of 1 m long rod = 12.2 / 12 kg   ∴ Weight of 6 m long rod = 12.2 x 6 / 12   = 6.1 kg   Option: 6.1 kg
<result>D</result>
If the weight of 12 meters long rod is 12.2 kg. What is the weight of 6 meters long rod ?