Question

Two cubes each on3 eadges are joined and to end . what is the total surface area of the ruseltimg​

Answer 1

Two cubes each of 10 cm edge are joined end to end. The surface area of the resulting cuboid is

a. 1200 cm²

b. 1000 cm²

c. 800 cm²

d. 1400 cm²

Step-by-step explanation:

• To find the surface area of the cuboid,

• Length of new cuboid, l = 10cm + 10cm

                                                 = 20 cm

• Height, h = 10 cm

• Width, b = 10 cm

Surface Area of Cuboid =2(lb+lh+bh)

• Substituting the above values,

• Surface Area of Cuboid = 2[(20×10)+(20×10)+(10×10)]

                                                = 2(200+200+100)

                                                = 1000 cm²

Therefore, the surface area of the resulting cuboid = 1000 cm²(option b)