Lagz said:Why do you keep posting your homework for us to do?
Killa_ken said:correct answer is 2 hours 24 minutes![]()
Haircut said:Sally's painting speed = 1/4 houses per hour
John's painting speed = 1/6 houses per hour
Therefore together it is 1/4+1/6 = 5/12 houses per hour.
So, it's 12/5 hours to paint the house = 2.4 hours = 2 hours 24 minutes.
e36Adz said:Most obvious thing is it HAS to be less then 4 hrs. How on earth are ppl getting answers higher then that![]()
andy8271 said:and i managed an a at gcse back in the day so god help our country if exams are getting easier
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Haircut said:Sally's painting speed = 1/4 houses per hour
John's painting speed = 1/6 houses per hour
Therefore together it is 1/4+1/6 = 5/12 houses per hour.
So, it's 12/5 hours to paint the house = 2.4 hours = 2 hours 24 minutes.