The ratio of two numbers is 4 : 5 and their HCF is 3. What will be their LCM?

Correct option is C

Given:

Ratio of two numbers = 4 : 5
HCF = 3

Formula Used:

LCM =$$\frac{\text{Product of numbers}}{\text{HCF}}$$​

Solution:
Numbers = 4 × 3 =12 and 5 × 3 = 15

LCM = $$\frac{12 \times 15}{3} = \frac{180}{3} = 60$$​