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 & Solution

Correct Answer: Option B

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

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3 Comments

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Vasanth Jadav 5 years ago

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

Onno Jogot 8 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

Ashutosh Raj 9 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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The milk and water in a mixture are in the ratio...

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:

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