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Question
Solve any two of the following.
If a : b = 7 : 2, find the ratios (i)` b : a` (ii) `(a+b)/b`
Solution
(1)` a:b=7:2`
`∴ b:a=2:7...............`invertendo
(2) `a/b=7/2 ∴ (a+b)/b=(7+2)/2=9/2............................ "Componendo"`
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