8. A cuboid of dimensions 10 cm by 2 cm by 2 cm is divided into 5 cube

1.	8. A cuboid of dimensions 10 cm by 2 cm by 2 cm is divided into 5 cubes of edge 2 cm.F ind the ratio ofthe total surface area of the cuboid and that of the cubes
Answer» Total surface area of cuboid = 2(10x2 + 10x2 + 2x2)= 2(20+20+4)= 2(44)= 88 cm^3 Total surface area of one cube= 6x(2x2)= 6x4= 24 cm ^3 For 5 cubes total surface area = 5x24 = 120 Ratio = surface area of cuboid / surface area of 5 cubesRatio = 88/120= 11/15

8. A cuboid of dimensions 10 cm by 2 cm by 2 cm is divided into 5 cubes of edge 2 cm.F ind the ratio ofthe total surface area of the cuboid and that of the cubes

Answer»

Total surface area of cuboid = 2(10x2 + 10x2 + 2x2)= 2(20+20+4)= 2(44)= 88 cm^3

Total surface area of one cube= 6x(2x2)= 6x4= 24 cm ^3

For 5 cubes total surface area = 5x24 = 120

Ratio = surface area of cuboid / surface area of 5 cubesRatio = 88/120= 11/15