Find the LCM of 1.2, 1.8, 2, 2.5.

Correct option is C

Given:

The numbers are 1.2, 1.8, 2, and 2.5

Concept Used:

To find the LCM of decimal numbers, we first convert each decimal to a fraction.

Then, we find the LCM of the numerators and HCF denominators separately and simplify to get the LCM of the original decimal values.

Formula used:

$$\text{LCM of fractions} = \frac{\text{LCM of numerators}}{\text{HCF of denominators}}$$ 

Solution: 

$$\text{Convert decimals to fractions:}\\\ \ \\1.2= \frac{6}{5},\ 1.8= \frac{9}{5}, \ 2= \frac{2}{1} , 2.5= \frac{5}{2} \\ \ \\ \text{LCM of numerators}=(6,9,2,5)=90\\ \ \\\text{HCF of denominators}=(5, 5, 1, 2)=1\\ \ \\ \text{Now, LCM of fraction}= \frac{90}{1}=90$$ 

Thus  correct option is (c).