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If 1/a :1/b :1/c=3:4:5, then a : b : c ...

If `1/a :1/b :1/c=3:4:5,` then `a : b : c`
(a) `5:4:3`
(b) `20 : 15 : 12`
(c) `9: 12 : 15`
(d) `12 : 15 : 20`

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RD SHARMA ENGLISH-RATIO AND PROPORTION-All Questions
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