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प्रश्न
It is given that l varies directly as m. Find m when l is 8.
उत्तर
Since, l varies directly as m.
If `l = 8`
∴ `l/m = k`
⇒ `8/m = 1/3` ...`[∵ k = 1/3]`
⇒ m = 8 × 3 = 24
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