What is the missing length of a rectangle or Prisma were the height and the width are both 9 cm and the surface area is 432 cm
The surface area of a rectangle is given by the formula:
Surface Area = 2(length x width) + 2(length x height) + 2(width x height)
Given that the height and width of the rectangle are both 9 cm and the surface area is 432 cm, we have:
432 = 2(length x 9) + 2(length x 9) + 2(9 x 9)
432 = 18length + 18length + 162
432 = 36length + 162
36length = 270
length = 270 / 36
length = 7.5 cm
Therefore, the missing length of the rectangle is 7.5 cm.