Advertisement Remove all ads

Fresh Grapes Contain 90% Water by Weight While Dried Grapes Contain 20% Water by Weight. What is the Weight of Dry Grapes Available from 20 Kg of Fresh Grapes? - Mathematics

Advertisement Remove all ads
Advertisement Remove all ads
MCQ

Fresh grapes contain 90% water by weight while dried grapes contain 20% water by weight. What is the weight of dry grapes available from 20 kg of fresh grapes?

Options

  • 2 kg

  • 2.4 kg

  • 2.5 kg

  • 2.6 kg

Advertisement Remove all ads

Solution

2.5 kg
Explanation :
Weight of fresh grapes = 20kg
Quantity of water in it = 90% of 20

= `90/100xx20` = 18kg

Quantity of pulp in it = (20 -18) = 2 kg
Let weight of dry grapes = y kg
Then, quantity of water in it = 20% of y

= `200/100xx "y"=1/5 "y"`

Quantity of pulp in it = `"y" -1/5"y" =4/5"y"`

∴ `4/5"y" =2 ⇒ "y" = (2xx5)/4=` 2.5kg

Concept: Percentage, Discount and Partnership (Entrance Exam)
  Is there an error in this question or solution?
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×