state gov DSSSB Junior Assistant, Steno and LDC Mock Test 2023 - 24 Quantitative Aptitude Time and Work Pipe and Cistern
A pipe can fill a pot in ‘a’ hours and another pipe can empty it in ‘b’ (b > a) hours. If both the pipes are open, then in how many hours will the pot be filled?
1
(a – b) hours
2
(b – a) hours
3
\(\frac{{{\rm{ab}}}}{{{\rm{a}} - {\rm{b}}}}\) hours
4
\(\frac{{{\rm{ab}}}}{{{\rm{b}} - {\rm{a}}}}\) hours