Question

when the denominator of 1/2√5 is rationalised it becomes √K/10 find K? Please friends help me ​

Answer 1

Answer:

k = 5.

Step-by-step explanation:

Here the number we have is, 1/2√5.

So lets rationalise it.

Thus we get,

$\frac{1}{2\sqrt{5} }$ multiplied by, $\frac{\sqrt{5} }{\sqrt{5} }$

This will give,

√5/10.

Thus on comparing, We can see that k = 5.

Hope it helps.

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Answer 2

Answer:

5

Step-by-step explanation:

$rationaling \: denominator \: \frac{1}{2 \sqrt{5} } \\ \\ \frac{1}{2 \sqrt{5} } \times \frac{2 \sqrt{5} }{2 \sqrt{5} } = \frac{ \sqrt{5} }{10 } \\ therefore \: k \: = 5$