need help with this answer

Answer:
1584km²
Step-by-step explanation:
The surface area for cylinder is 2πrh + 2πr²
but to make it easy, factorize it to become 2πr(h + r)
h = 29km, r = d/2
r = 14/2 = 7
SFA = 2 × 22/7 × 7(29 + 7)
SFA = 308/7(36)
simplify
11088/7 = 1584km²
Hope this helps!