Question
1.
2.
3.
4.
Answer (Detailed Solution Below)
Option 1 : $20\%$
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Detailed Solution
सही उत्तर $20\%$ है।
Key Points
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prepsnap.in • Part -AQuestion:
If the price of petrol is increased by $25\%$, by what percentage must a car owner reduce his consumption of petrol so that his expenditure remains unchanged? / यदि पेट्रोल की कीमत में $25\%$ की वृद्धि हो जाए, तो एक कार मालिक को पेट्रोल की खपत में कितने प्रतिशत की कमी करनी चाहिए ताकि उसका व्यय अपरिवर्तित रहे?
1.
$20\%$
2.
$25\%$
3.
$16.67\%$
4.
$22\%$
Correct Answer: $20\%$
Required reduction = $\frac{25}{100+25} \times 100 = 20\%$, because expenditure = price × consumption and the quantity must fall to $\frac{4}{5}$ of its original level. / आवश्यक कमी = $\frac{25}{100+25} \times 100 = 20\%$।
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