Surya can complete a work in 12 days and Sakthi can complete the same work in 18 days. If both work together, how many days will they take to complete the work?

Given

Surya's time to complete work = 12 days
Sakthi's time to complete work = 18 days

Explanation

Step 1: Find daily work rate of Surya and Sakthi

Step 2: Find combined 1-day work

LCM of 12 and 18 = 36

So, together they do ( \frac{5}{36} ) of the work in 1 day.

Step 3: Find total days to complete 1 work

✅ Answer

7.2 days (Option C)