A jar was full with honey. A person used to draw out 20% of the honey from the jar and replaced it with sugar solution. He has repeated the same process 4 times and thus there was only 512 gm of honey left in the jar, the rest part of the jar was filled with the sugar solution. The initial amount of honey in the jar was filled with the sugar solution. The initial amount of honey in the jar was:

• A. None of these
• B. 1 kg
• C. 1.25 kg
• D. 1.5 kg

Answer: (C)

Let the initial amount of honey in the jar was K, then    512 = K 1 - 1 5 4      ?   20 %   = 20 100 = 1 5         or       512 = K 4 5 4 Therefore, K = 1250 Hence initially the honey in the jar= 1.25 kg