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Sagot :
It doesn't really matter that the jar is 8 inches high. What matters is how high the jelly is (3 inches), so the height that matters is 3 inches. The diameter of the jar is 4 inches. We need to know the radius of the circle in order to find out the area of the circle, so divide the diameter in half. So half of 4 inches is 2 inches, which is the radius. Use the formula where the volume is equal to pi times the radius squared times the height:
Volume = 3.14 *( 2)^ 2 * 3 Square the 2 first
Volume = 3.14 * 4 * 3 Multiply by 3
Volume = 3.14 * 12 Then multiply by pi (3.14)
Volume = 37.68
(If you round it to more than the hundredth for pi, like 3.14159, then your answer would be 37.69908)
(If you use 3.141592653589 for pi, then
Volume = 37.699111843068, etc.)
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