What is the volume of 25 pennies in cubic centimeters?

The diameter of a U.S penny is 19.05 millimeters; one U.S. penny has a thickness of 1.55 millimeters. Here are the steps for calculating the volume of 25 U.S. pennies and converting the answer into cubic centimeters. First, go ahead and convert the measurements mentioned above from millimeters into centimeters, otherwise the final answer will be in cubic millimeters:

19.05 millimeters = 1.905 centimeters (diameter of penny)

1.55 millimeters = 0.155 centimeters (thickness of penny) Next, find the thickness of 25 pennies:

0.155 x 25 = 3.875 centimeters

Next, find a penny's radius by dividing its diameter by 2; a radius is half of a diameter:

1.905/2 = 0.9525 centimeters

Next, find the area of a penny's face using the formula: pi (3.14) multiplied by the square of the radius:

0.9525 x 0.9525 x 3.14 = 2.84878462 square centimeters

Finally, find the volume of 25 pennies by multplying the area of a penny's face by the thickness of 25 pennies:

2.84878462 x 3.875 = 11.0390404 cubic centimeters (this is the volume of 25 U.S. pennies)

.9 cubic centimeters