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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THIS TYPE OF SHORT TRICK SOLUTION ---WE EXPECT FROM THE EXAMVEDA RATHER THAN LONG SOLUTION
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
Milk is constant and water changes from 5 to to 8
difference of 3 = 15L
Therefore 8= 15*8/3= 40L