Question

its urgent pls help me​

Answer 1

Answer:

5 is the ans as

$\frac{1}{ 2 \sqrt{5} } \times \frac{2 \sqrt{5} }{2 \sqrt{5} }$

$\frac{2 \sqrt{5} }{4 \times 5} = \frac{2 \sqrt{5} }{20}$

now the numerator and denominator will cut from 2

$\frac{ \sqrt{5} }{10}$

here√k =√5 so k=5

please mark me as brainliest

Answer 2

= 1 / 2√5 × 2√5 / 2√5

= 2√5 / 4×5

= 2√5 / 20

= √5 / 10

= √k / 10 = √5 / 10

k = 5