RRB NTPC Mains or Stage 2 Model Paper 8 with solutions

Question : 5 of 120

Marks: +1, -0

In a mixture of milk and water the proportion of water by weight was 75% if in the 60 gms mixture 15 gms water was added, what would be the percentage of water in the new mixture?

75%
80%
90%
100%

Validate

Solution:

(b) In 60 gm. of mixture,
Quantity of water

60 ×75/100=45gm

Quantity of milk = 15 gm
After mixing 15 gm of more water, Quantity of water in new mixture
= 45 + 15 = 60 gm
∴Quantity of water in 75 gm of mixture = 60 gm∴100 gm of mixture will contain

=60/75×100=80%

of water

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