Time & Work – Common Question Types
Basic concept
If A does a work in X days, efficiency = 1/X
Combined work
A + B can do a work in Y days – use combined efficiency
One works, one joins later
First works alone, then both work – split time and add work done
Part work
Work done for some days, then stopped – calculate total using efficiency
Men, women, children
Given their ratios or relative efficiencies, mix in the equation
Pipes & Cisterns
Same as Time & Work logic, but Inlet = +ve, Outlet = -ve
Alternate working days
A works one day, B next day – calculate how much each did in their turns
Efficiency ratio
Sometimes A:B work ratio is given – use inverse for time
Work + Leave
A leaves before completion, find total time
Work-based puzzles
“A is 50% more efficient than B…” – efficiency ratio impacts time proportionally
