Final answer:
The perimeter of the rectangular keyboard is found by doubling the length and the width and adding the results, which equals 946 mm, making option (a) the correct answer.
Step-by-step explanation:
To find the perimeter of a rectangular keyboard, we use the formula P = 2l + 2w, where P stands for perimeter, l is the length, and w is the width of the rectangle. Given the length as 332 mm and the width as 141 mm, the perimeter can be calculated as follows:
P = 2 × 332 mm + 2 × 141 mm
P = 664 mm + 282 mm
P = 946 mm
Hence, the accurate perimeter of the rectangular keyboard totals 946 mm, confirming option (a) as the correct choice, aligning with the calculated perimeter based on the given length and width dimensions of the keyboard.