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Question
The costs of the two articles are in the ratio 7 : 4. If the cost of the first article is Rs. 2,800; find the cost of the second article.
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Solution
Ratio in the cost of two articles = 7 : 4
Cost of first article = Rs. 2800
Let cost of the second article = x
7 : 4 = 2800 : x
⇒ `7/4=2800/"x"`
⇒ 7 × x = 2800 × 4
⇒ x = `(2800xx4)/7=1600`
∴ Cost of second article = Rs. 1600
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