average hours worked for household running costs

[rachael30a]

Hi could someone please refresh my memory on how've work out my average hours worked in a week, as some I've done 30plus others only 15-20
Thanks

[Kiddleywinks]

A 4 week month would have 4 weeks worth of hours divided by 4 weeks to get an average

so week 1 @30hrs, wk2 @15hrs, wk3 @30hrs and wk4 @20hrs =95hrs / 4 (wks) = 23.75 averaged