When processing flower-nectar into honey bees' extract, a considerable amount of water gets reduced. How much flower-nectar must be processed to yield 1kg of honey, if nectar contains 50% water, and the honey obtained from this nectar contains 20% water? Select the correct option:
A) 1.2 kg
B) 1.5 kg
C) 1.7 kg
D) 1.6 kg
E) None of these
Explanation :   Flower-nectar contains 50% of non-water part.   In honey this non-water part constitutes 80% (100-20).   Therefore 0.5 X Amount of flower-nectar = 0.80 X Amount of honey = 0.80 X 1 kg   Therefore amount of flower-nectar needed =   (0.80/0.51)kg=1.6 kgs   Answer : 1.6 kg
<result>D</result>
When processing flower-nectar into honey bees' extract, a considerable amount of water gets reduced. How much flower-nectar must be processed to yield 1kg of honey, if nectar contains 50% water, and the honey obtained from this nectar contains 20% water?