Fresh grapes contain 60% water by weight and raisins obtained by drying fresh grapes contain 25% ...
Fresh grapes contain 60% 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 20kgs of raisins?
Answer/Solution
37.5 kgs
Steps/Work
The weight of non-water in 20 kg of dried grapes (which is 100-25=75% of whole weight) will be the same as the weight of non-water in x kg of fresh grapes (which is 100-60=40% of whole weight),
so 20*0.75 = x*0.4
--> x = 37.5.
Answer: C
so 20*0.75 = x*0.4
--> x = 37.5.
Answer: C