The value of \(\frac{{\sqrt {10 - \sqrt {84} } - \sqrt {8 - \sqrt {60} } }}{{\sqrt {12\; + \;\sqrt {140} } }}\) correct one decimal place is:

The value of \(\frac{{\sqrt {10 - \sqrt {84} } - \sqrt {8 - \sqrt {60}

1.	The value of \(\frac{{\sqrt {10 - \sqrt {84} } - \sqrt {8 - \sqrt {60} } }}{{\sqrt {12\; + \;\sqrt {140} } }}\) correct one decimal place is:
A.	0.1
B.	0.4
C.	0.5
D.	0.8
Answer» B. 0.4