Expression of the work when doing jointly- 3/4 x
Individually - Jennffer would take "x" units of time
Daniel would take "3x" unit of time
Explanation:
Let us assume that jennfer takes “x” unit of time
Hence Daniel would take 3 times more times (provided in the question) = “3x”
Efficiency= Mathematically efficiency can be defined as inverse of the time taken to do the work. More is the time taken, less would be the efficiency and vice versa
Please refer to the image attached with for the calculation part
Hence, when doing work jointly, both take ¾ of the time taken by jennfer to do the work
When individually-
Jennfer takes “x” and Daniel “3x” units of time