Question

In a mixture of milk and water the proportion of water by weight was 75%. If in 60 gm of mixture 15 gm water was added, what would be the percentage of water ? (Weight in gm)
A) 80%
B) 70%
C) 75%
D) 62%

Answer 1

In a mixture of milk and water the proportion of water by weight was 75%. If in 60 gm of mixture 15 gm water was added, what would be the percentage of water ? (Weight in gm)

A) 80%
B) 70%
C) 75%
D) 62%

ĀNSWĒR ⏬⏬
  A) 80%

Explanation:

Water in 60 gm mixture=60 x 75/100 = 45 gm. and Milk = 15 gm.

 

After adding 15 gm. of water in mixture, total water = 45 + 15 = 60 gm and weight of a mixture = 60 + 15 = 75 gm.

 

So % of water = 100 x 60/75 = 80%.


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Answer 2

Given: In a mixture of milk and water, the proportion of water by weight was 75%. If in 60 gm of mixture 15 gm water was added

To find: the percentage of water

Solution: We are given the percentage of water in a mixture that is 75%

The total weight of the mixture given is 60g

So we can calculate the weight of water in this mixture as

Ww= 75/100×60

Ww= 45g

And the weight of milk will be Wm= 15g

After adding 15g of water new weight of the water will be

Ww= 45+15= 60g

We know that percentage of water can be calculated through the formula as

We = weight of water/ weight of mixture ×100

Ww= 60/75 ×100 = 80%

Therefore, the percentage of water will be A) 80%.