1.

The proportion among three numbers is 3 : 4 : 5 and their LCM is 1800. The second number is:1. 1502. 1203. 304. 90

Answer» Correct Answer - Option 2 : 120

Given - 

LCM = 1800

ratio between the number = 3 : 4 : 5

Solution - 

Let the numbers be 3x, 4x, and 5x respectively.

⇒ LCM (3x, 4x, 5x) = 1800

⇒ 60x = 1800

⇒ x = 30

⇒ second number = 4x = 120

∴ second number = 120.



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