3750 cm square of wallpaper is needed to glue a cube-shaped box. Can Dad cut out the whole necessary piece of wallpaper as a whole if he has a roll of wallpaper 50 cm wide?


x =  0


S=3750 cm2  S=6a2  a=S/6=3750/6=25 cm  t=50 cm b=3 a=3 25=75 cm b>t x=0S=3750 \ \text{cm}^2 \ \\ \ \\ S=6a^2 \ \\ \ \\ a=\sqrt{ S/6 }=\sqrt{ 3750/6 }=25 \ \text{cm} \ \\ \ \\ t=50 \ \text{cm} \ \\ b=3 \cdot \ a=3 \cdot \ 25=75 \ \text{cm} \ \\ b>t \ \\ x=0

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