RRB RPF RPSF SI and CONS Model Papers 3 with solutions

Question : 31 of 120

Marks: +1, -0

The proportion of acid and water in three samples is 2 : 1, 3 : 2 and 5 : 3. A mixture containing equal quantities of all three samples is made. The ratio of water and acid in the mixture is:

120 : 133
227 : 133
227 : 120
133 : 227

Validate

Solution:

(b) Required ratio

= ( { 2 }/ { 3 } + { 3 }/ { 5 } + { 5 }/ { 8 } ) : ( { 1 }/ { 3 } + { 2 } /{ 5 } + { 3 }/ { 8 } )

= \ ( { 80 + 72 + 75 }/ { 120 } ) : ( { 40 + 48 + 45 }/ { 120 } )

= 227 : 133

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