Answer:

- 191619.84 cm^3
- 277859.06 cm^3
Explanation:
\pi r^{2} h
Using the above formula, you must first convert the (in) to (cm) since volume is measured in cm^{3}. And we can transform the (in) to (cm) by multiplying the in by 2.54
ie. For the first question, 19in = (19 * 2.54) = 48.26cm, convert the diameter to the radius and then to cm. To convert to the radius, divide the diameter by 2 ie. (d/2) = (28/2) = 14in. Convert to cm, 14 * 2.54 = 35.56cm
hence apply the formula.
3.14 * (35.56)^2 * 48.26 = 191619.84 Cm^3
Apply the same formula for the second part and you should get the answer.