heCoA cuboid 3 cm x 4 cm Ă5cm) is cut into unit cubes. The ratio of

1.	heCoA cuboid 3 cm x 4 cm Ă5cm) is cut into unit cubes. The ratio of the total surface area of all the unitcubes to that of the cuboid is
Answer» Volume of cuboid = 3 cm × 4 cm × 5 cm = 60 cm3 number of unit cubes made out of given cuboid = 60 Total Surface Area of unit cubes = 60 × 6 = 360 cm2. Surface area of given cuboid = 2×[ 3×4 + 4×5 + 5×3 ] = 2×[12 + 20 +15 ] = 94 cm2 Ratio of total surface area of unit cubes to the surface area of given cuboid = 360 : 94 = 180 : 47

heCoA cuboid 3 cm x 4 cm Ă5cm) is cut into unit cubes. The ratio of the total surface area of all the unitcubes to that of the cuboid is

Answer»

Volume of cuboid = 3 cm × 4 cm × 5 cm = 60 cm3

number of unit cubes made out of given cuboid = 60

Total Surface Area of unit cubes = 60 × 6 = 360 cm2.

Surface area of given cuboid = 2×[ 3×4 + 4×5 + 5×3 ] = 2×[12 + 20 +15 ] = 94 cm2

Ratio of total surface area of unit cubes to the surface area of given cuboid = 360 : 94 = 180 : 47