Answer: 480 and 253.2
Explanation:
For the first one we want to do (12 x 5 / 2) x 16 which equals 480.
For the next question, the answer is 253.2 because 2πrh is the formula of lateral area. If we just plug in the numbers it's (2 x 3.14 x 4.8 x 8.4) = 253.2cm