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sam can prepare 20 wall paintings in four weeks. How much time will he need to prepare 80 wall paintings

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Zozo2015id

1st week= 20 walls

2nd week= 20+20=40 walls

3rd week= 20+20+20=60 walls

4th week= 20+20+20+20=80 walls

Therefore, in 4 weeks 80 walls in total will be painted

Me11yagnid
20
4    = x
         80

4x=1600
x= 1600/4
x=400


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