Question

Three cubes each with 8cm edge are joined end to end .find the total surface area of the resulting cuboid

Answer 1

As the cubes are joined one of the dimension becomes 24 cm. Then apply the formula:
2(lb+bh+hl)
=2(24*8+8*8+24*8)
=2(192+64+192)
=2(448)
=896 cm sq

Answer 2

Answer: 896 $cm^{2}$

Step-by-step explanation:

Given, length of edge of cube = 8 cm

∴ Length of cuboid = 3 * 8 = 24 cm

∴ Width of cuboid = 8 cm

∴ Height of cuboid = 8 cm

∴ Total surface area of cuboid = 2(lb + bh + hl)

                                                  = 2 (24* 8 + 8 * 8 + 8 * 24)

                                                  = 896 $cm^{2}$