Find the surface area and the volume of a cylinder with a radius of 9in and height of 20in plzzz show your work

Volume= (3.14x9x9)x20 =5089.38in³
Surface area=2x3.14x9(20+9)= 1639.91in²

To find the least number of rows she can make will be found by finding the biggest way to divide these into equal groups (greatest common factor).

You can use prime factorizations of each number to find the gcf.

150 - 2 x 3 x 5 x 5
360 - 2 x 2 x 2 x 3 x 3 x 5

The common prime numbers are 2 x 3 x 5

You can make 12 (360/30) rows of pink and 5 (150/30) rows of red.