If the mean proportional of 81 and 256 is x and the third proportional – McqOptions

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1.	If the mean proportional of 81 and 256 is x and the third proportional of 16 and 36 is y, then what will be the value of x : y?
A.	4 : 3
B.	16 : 9
C.	3 : 4
D.	9 : 16
Answer» C. 3 : 4

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