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If you're talking about a five sided figure, just add up your figures.
135cm
180cm3
Volume of cylinder: pi*25*9 = 706.858 cubic cm rounded to 3 decimal places
Volume of cylinder: pi*5 squared *9 = 706.858 cubic cm rounded to 3 decimal places
9cm + 5cm + 9cm + 5cm = 28cm
0cm
If you're talking about a five sided figure, just add up your figures.
135cm
180cm3
It's 54
11cm
Oh, what a happy little rectangle we have here! To find the perimeter, you simply add up all the sides. So, for this rectangle with sides of 9cm and 5cm, the perimeter would be 2(9cm) + 2(5cm) = 18cm + 10cm = 28cm. Just a few simple brushstrokes and you've got your answer!
Volume of cylinder: pi*25*9 = 706.858 cubic cm rounded to 3 decimal places
It depends upon how big a grout line you want between tiles. If there were NO grout line (i.e., tiles are pressed against each other), it would be easy to multiply 18m by 1.5m and by 5cm by 9cm, and divide those results to find the total of 6,000 tiles (27 square meters filled with tiles each of 45 square cm). If you line up 9cm tiles end-to-end, you will need 200 of them for 18m. If you line up 5cm tiles side-by-side, you will need 30 columns of them to get 1.5m.
The answer is, you can draw a rectangle with these measurements: 6cm and 9cm 5cm and 10cm 7cm and 8cm
Volume of cylinder: pi*5 squared *9 = 706.858 cubic cm rounded to 3 decimal places