Mathematics
Pipes and Cisterns Filling
Find the rate at which two inlet pipes fill a tank together.
Combined Rate = 1/A + 1/B
Formula Explanation
Each pipe contributes its own filling rate; rates are added.
Variables Explained
A, B = time taken by each pipe alone to fill the tank.
Solved Example
Pipe A fills in 6 hours, B in 3 hours. Together?
1/6 + 1/3 = 1/2 → 2 hours.