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
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
Share
Notifications

View all notifications


      Forgot password?
View in app×