If $$3a = 4b = 6c$$and $$a + b + c = 27\sqrt {29} {\text{,}}$$then $$\sqrt {{a^2} + {b^2} + {c^2}} $$is ?

If $$3a = 4b = 6c$$and $$a + b + c = 27\sqrt {29} {\text{,}}$$then $$\

1.	If $$3a = 4b = 6c$$and $$a + b + c = 27\sqrt {29} {\text{,}}$$then $$\sqrt {{a^2} + {b^2} + {c^2}} $$is ?
A.	$3\sqrt {29} $$
B.	1
C.	7
D.	one of these
Answer» D. one of these