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Quantitative Aptitude

Simple Interest & Compound Interest

How many kilo...

Question

How many kilograms of salt at 42 paise per kg must a man mix with 25 kg of salt at 24 paise per kg so that he may on selling the mixture at 40 paise per kg gain 25% on the outlay?

15 kg

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18 kg

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20 kg

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24 kg

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None

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Solution

The correct option is C
20 kg

CP of mixture = $40 \times \frac{100}{100 + 25}$ = 32 paise

$\frac{q 1}{q 2} = \frac{32 - 24}{42 - 32} = \frac{4}{5}$

q1= $\frac{4}{5} \times 25$ =20kg

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How many kilograms of salt at 42 paise per kg must a man mix with 25 kg of salt at 24 paise per kg so that he may on selling the mixture at 40 paise per kg gain 25% on the outlay?

The correct option is C 20 kg CP of mixture = 40×100100+25 = 32 paise q1q2=32−2442−32=45 q1=45×25=20kg

The correct option is C
20 kg

CP of mixture = $40 \times \frac{100}{100 + 25}$ = 32 paise

$\frac{q 1}{q 2} = \frac{32 - 24}{42 - 32} = \frac{4}{5}$

q1= $\frac{4}{5} \times 25$ =20kg