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  1. If a + b + c = 4√3 anda2 + b² + c² = 16, then the ratio a : b : c is
    1. 1 : 1 : 1
    2. 1 : √2 : √3
    3. 1 : 2 : 3
    4. None of these
Correct Option: A

(a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca
⇒ (4√3)² = 16 + 2(ab + bc + ca)
⇒ 48 = 16 + 2(ab + bc + ca)
⇒ 2(ab + bc + ca) = 48 – 16 = 32
⇒ ab + bc + ca = 16

∴ a = b = c =
4√3
=
4
33

∴ a : b : c = 1 : 1 : 1



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