list five object that can be recycled and reused.note their shapes.classify them as 2D or 3D. find out formula to calculate their area and volume
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five object that can be recycled and reused
their shapes , classify them as 2D or 3D
calculate their area and volume
Aluminum cans = Cylindrical Shape - 3D
Surface Area = πRh + 2πR² = 22πR ( h + R)
Volume = πR²h
Corrugated Cardboard = Cube , Cuboid - 3D
Volume of cuboid = abc ( where a , b & c are sides)
Cube is also cuboid where a = b = c
Surface Area of cuboid = 2 (ab + bc + ca)
Paper - Rectangle / Square - 2D
Area = Length * width
in square Length= Width
Plastic Bottles - Cylindrical - 3D
News Paper - Rectangle - 2D
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