Examveda
Examveda

The milk and water in a mixture are in the ratio 7 : 5. When 15 liters of water are added to it, the ratio of milk and water in the new mixture becomes 7 : 8. The total quantity of water in the new mixture is:

A. 35 litres

B. 40 litres

C. 60 litres

D. 96 litres

Answer: Option B

Solution(By Examveda Team)

Milk   :   Water
7 : 5
7 : 8
    3 unit

∴ Remember water is added and not milk, so make milk equal but here milk is already equal
3 units = 15 litres
1 units = 5 litres
8 units = 40 litres
Total quantity of water in the new mixture = 40 litres

This Question Belongs to Arithmetic Ability >> Ratio

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Comments ( 3 )

  1. Vasanth Jadav
    Vasanth Jadav :
    3 years ago

    THIS TYPE OF SHORT TRICK SOLUTION ---WE EXPECT FROM THE EXAMVEDA RATHER THAN LONG SOLUTION

  2. Onno Jogot
    Onno Jogot :
    6 years ago

    let's, milk = 7x
    water = 5x
    after adding 15L of water.
    water = 5x + 15.

    so,
    7x / (5x + 15) = 7/8
    => 21x = 105
    => x= 5.

    So, water = 5x + 15
    = 5*5 + 15
    = 40

  3. Ashutosh Raj
    Ashutosh Raj :
    6 years ago

    Milk is constant and water changes from 5 to to 8
    difference of 3 = 15L
    Therefore 8= 15*8/3= 40L

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