SSC CHSL 2020 PYQ — Question 54

SSC CHSL - 13th October 2020 - Shift 1 • Quantitative Aptitude • Q54

If 2145 : X ∷ 3003 : 42, then the value of Y so that X : 2508 ∷ Y : 11704, is:

Show answer & explanation

Correct answer: A

Explanation

The correct answer is option 1 i.e 140

Here we would be finding the value of the unknown by the ratio and proportion.

⇒ 2145 : X ∷ 3003 : 42

⇒ 2145 / X = 3003 / 42

⇒ X = (2145 × 42) / 3003 

⇒ X = 30

⇒ 30 : 2508 ∷ Y : 11704

⇒ 30 / 2508 = Y / 11704

⇒ Y = (11704 × 30) / 2508

⇒ Y = 140