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Q.

State true or false.


The mean proportional between 0.4 and 0.9 is 6 .


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a

True

b

False 

answer is B.

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Detailed Solution

It is given that, the mean proportional between 0.4 and 0.9 is 6 .
The mean proportion is given by,
a:b::b:c
a b = b c
Substitute the known values within the formula,
x×x=0.9×0.4 x 2 =0.36 x= 0.36 x=0.6
The mean proportion is 0.6 and not 6 .
Hence the statement is false.
Hence option 2) is correct.
 
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