James plans to place flower pots along the perimeter of his rectangular garden. He measures the quantities shown to estimate the number of
cylindrical flower pots he should buy.
• length of the garden
• width of the garden
• spacing between the flower pots
Which additional quantity would be most useful for James's estimation?
A height of the flower pots
B volume of the flower pots
C diameter of the flower pots
D surface area of the flower pots