1.

1). 91 : 35 : 652). 65 : 35 : 913). 35 : 91 : 654). 7 : 13 : 5

Answer»

According to the GIVEN information,

LCM of 5, 13 and 7 is 455.

On dividing the given equation by 455, we get,

5A/455 = 13B/455 = 7C/455

⇒ A/91 = B/35 = C/65

⇒ A/B = 91/35

⇒ B/C = 35/65

∴ A : B : C = 91 : 35 : 65

Hence (a) is correct



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