A box which measures 40 cm * 32 cm* 12 cm is to be covered completely with canvas how many metres of canvas of widht 25 cm would be required to cover 100 such boxes
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dimensions of box are 40cm*32cm*12cm
So, surface area of box=2(lb+bh+lh),where l=length, b=breadth, h=height of the cuboid
Therefore,area=2(40×32+32×12+40×12)
=2(1280+384+480)
=2×2144
=4288cm^2
Hence surface area of 100 boxes=100×4288cm^2
=42880cm^2
Also the surface area of canvas will be same
therefore, required length of canvas
=surface area÷width
=42880÷25
=1715.2cm
=17.152m
So, surface area of box=2(lb+bh+lh),where l=length, b=breadth, h=height of the cuboid
Therefore,area=2(40×32+32×12+40×12)
=2(1280+384+480)
=2×2144
=4288cm^2
Hence surface area of 100 boxes=100×4288cm^2
=42880cm^2
Also the surface area of canvas will be same
therefore, required length of canvas
=surface area÷width
=42880÷25
=1715.2cm
=17.152m
infant35:
thank you so much
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