1.
If $$3a = 4b = 6c$$   and $$a + b + c = 27\sqrt {29} {\text{,}}$$    then $$\sqrt {{a^2} + {b^2} + {c^2}} $$    is ?

2.
The square root of $${\text{0}}{\text{.}}\overline {\text{4}} $$  is ?

3.
$$\sqrt {0.2} = ?$$

4.
The value of $$\sqrt {0.121} $$   is = ?

5.
The value of $$\sqrt {\frac{{0.16}}{{0.4}}} $$   is = ?

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