The following geometrical shapes are made up of paper. ___ required the least amount of paper and ___ has the maximum volume.
Cube, Cylinder
Calculating Surface Area of each figure:-
Surface Area of Cube = 6a2= 6 × 4 × 4 = 96 cm2
Surface Area of Cuboid = 2(lb + bh + hl) = 2(10 × 5 + 5 × 2 + 2 × 10) = 2 × 80 =160 cm2
Surface Area of Cylinder = 2πrh = 2 × 227 × 5 × 14 = 440 cm2.
Hence on comparison cube would require the least amount of paper since it has the minimum surface area.
Calculating Volume of each figure :-
Volume of Cube = a3 = 64 cm3
Volume of Cuboid = l × b × h = 10 × 5 × 2 =100 cm3
Volume of Cylinder = πr2h = 227 × 25 × 14 = 1100 cm3
Hence on comparison cylinder would have maximum volume.