Working efficiencies of P and Q for completing a piece of working are in the ratio 3 : 4. The number of days to be taken by them to complete the work will be in the ratio ?

Solution (By Examveda Team)

Since we know efficiency and time are inversely proportion to each other.
$$\eqalign{ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{P}}:{\text{Q}} \cr & {\text{Efficiency}}\,\,\,3:4 \cr & {\text{Time}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,4:3 \cr} $$