A hospital uses a mixture of salt and water at Rs. 7.62/litre. This mixture contains 5 % salt. Another mixture containing 75 % water costs Rs. 7.82/litre. How much does the patient pay if he buys 5 litres of mixture containing 18% salt?
Rs. 83.75
Incorrect AnswerRs. 73.85
Incorrect AnswerRs. 37.85
Incorrect AnswerExplanation:
1st mixture contains 5 % salt. 2nd mixture contains 75 % water i.e. 25 % salt.
Required % of salt = 18 %.
∴ Required ratio = 25 – 18 : 18 – 5 = 7 : 13
and required price of the mixture = 7.82 – x : x – 7.62 = 7 : 13
⇒ x = 7.75/ liter.
price of 5 liters of this mixture = 7.75 x 5 = Rs. 38.75.
Hence, option 4 is the correct answer.
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By: Amit Kumar