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प्रश्न
Find the value of x, if: (2x + 1) : (3x + 13) is the sub-duplicate ratio of 9 : 25.
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उत्तर
(2x + 1) : (3x + 13) is the sub-duplicate ratio of 9 : 25
Sub-duplicate ratio of 9 : 25 = 3 : 5
`(2x + 1)/(3x + 13) = 3/5`
10x + 5 = 9x + 39
10x – 9x = 39 – 5
x = 34
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