Question

Please find entire surface are of a stereo receiver (question 17)

Answer 1

We could approach the stereo receiver to a rectangular prism, that has the formula of surface area (A):

`A=2ab+2bc+2ac`

As the dimensions are given: a = 18", b = 16", c = 9"; then we just have to replace these values in the formula:

`A=2(18)(16)+2(16)(9)+2(18)(9)`

Simplifying:

`A=576+288+324`

`A=1188`

Answer: 1188 in²