218. Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill cistern. How much time will be taken by A to fill the cistern separately? September 23, 2025 by Admin A. 1 hr B. 2 hrs C. 6 hrs D. 8 hrs ✅ The correct answer is option C. 6 hrs.
