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If x is the mean proportional between 12...

If x is the mean proportional between 12.8 and 64.8 and y is the third proportional to 38.4 and 57.6, then 2x:y is equal to:
यदि 12.8 तथा 64.8 का माध्य समानुपाती x है और y, 38.4 एवं 57.6 का तीसरा समानुपाती है, तो 2x:y का मान किसके बराबर होगा ?

A

`2 :3`

B

`4 :5`

C

`3:4`

D

`1: 2`

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