Question

A cylindrical water bottle has a diameter of 2.5 inches and a height of 12 inches. The water surface 2.5 inches from the top. To the nearest cubic inch, how much water is in the water bottle?

Answer 1

Volume of a cylinder is = π x r² x h

radius = diameter / 2 = 2.5 / 2 = 1.25

r² = 1.25 x x1.25 = 1.56 inches

Height = height of the water = 12 - 2.5 = 9.5

So V = 3.14 x 1.56 x 9.5 = 46.53 = 47 cubic inches of water