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एक वस्तु की कीमत (₹x) है। (₹5) कम कीमत पर खरीदी जाए तो (₹300) में (3) वस्तुएँ अधिक मिलती हैं। मूल कीमत क्या है?

The price of an article is (₹x). If it is bought at (₹5) less, (3) more articles can be bought for (₹300). What is the original price?

Explanation opens after your attempt
Correct Answer

B. (₹25)

Step 1

Concept

Let original price be (x), then \(\frac{300}{x-5}-\frac{300}{x}=3\). This gives \(x^2-5x-500=0\), so (x=25).

Step 2

Why this answer is correct

The correct answer is B. (₹25). Let original price be (x), then \(\frac{300}{x-5}-\frac{300}{x}=3\). This gives \(x^2-5x-500=0\), so (x=25).

Step 3

Exam Tip

मूल कीमत (x) हो, तो \(\frac{300}{x-5}-\frac{300}{x}=3\)। इससे \(x^2-5x-500=0\), इसलिए (x=25)।

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