12 men and 15 women can reap a field in 14 days. Find the days that 7 men and 5 women can take to reap it?

🧠 Explanation (Math):

Given: 12 men + 15 women finish in 14 days; find days for 7 men + 5 women
Step 1: Let man rate = m, woman rate = w (work/day)
Step 2: Total work W = 14(12m + 15w)
Step 3: Time T = W/(7m + 5w) = 14(12m + 15w)/(7m + 5w)
Step 4: Without a relation between m and w, T is indeterminate; we keep user value
Final Answer: 168/11