If l : m : n = 1 : 2 : 4, then \(\sqrt {\frac{ {5{l^2} + {m^2} + {n^2} – McqOptions

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1.	If l : m : n = 1 : 2 : 4, then \(\sqrt {\frac{ {5{l^2} + {m^2} + {n^2}}}{l^2}}\) is equal to:
A.	4n
B.	5l
C.	2m
D.	5
Answer» E.

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