Question
Two numbers are in the ratio 4 : 5 and their least
common multiple (LCM) is 1800. What are the two numbers?Solution
ATQ, Let numbers be 4k and 5k (4 and 5 are coprime). LCM of 4k and 5k = 20k. Given 20k = 1800 ⇒ k = 90. Numbers are: 4 × 90 = 360 and 5 × 90 = 450. Correct option: C) 360 and 450
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