Fresh grapes contain 80% water by weight and raisins obtained by drying fresh grapes contain 25% water by weight. How many kgs of fresh grapes are needed to get 40 kgs of raisins? Choose the correct option
A) 150 kgs
B) 64kgs
C) 72 kgs
D) 65 kgs
E) 70 kgs
The weight of non-water in 40 kg of dried grapes (which is 100-25= 
<gadget id="calculator">100-25</gadget>
<output>75</output>
75% of whole weight) will be the same as the weight of non-water in x kg of fresh grapes (which is 100-80= 
<gadget id="calculator">100-80</gadget>
<output>20</output>
20% of whole weight), so   40*0.75= x*0.2   --&gt; x = 150.   150 kgsnswer: 150 kgs.
<result>A</result>
Fresh grapes contain 80% water by weight and raisins obtained by drying fresh grapes contain 25% water by weight. How many kgs of fresh grapes are needed to get 40 kgs of raisins?