Hello! From what was given in the question, this is what I’ve come up with:
Side Lengths: 30 cm
Pentagon Sides: 5 sides
The picture I’ve attached shows the solution as well as the answer. If you are unable to open the image, your answer would be:
Rounded to Whole: 1548 cm
Not Rounded: 1548.43 cm
Hope this helps, don’t hesitate to let me know if you have additional inquiries.