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$$a : b = 3 : 5 :: ab = 2535 \Rightarrow a + b =$$
104
108
112
116
a = 3k
b = 5k
$$15k^2 = 2535$$
$$k^2 = 169$$
$$k = 13$$
sum $$\Rightarrow 8k = 104$$
Hence the answer is option A
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