Answer:
90π units²
Step-by-step explanation:
(refer to attached)
Total Surface are off a right cylinder = area of its ends + area of curved surface
Given radius, r = 3 units and height, h = 12 units
Area of 2 ends,
= Area of 2 circles
= 2 x πr²
= 2π (3²)
= 2π (9)
=18π units²
Area of curved surface,
= 2πrh
= 2π(3)(12)
= 72π units²
Hence,
Surface area = 18π + 72π = 90π units²
Answer: 3
Step-by-step explanation:
Given
Zendaya has 5656 yards of wood
Each rack need 1616 yards
Number of racks that can be formed using 5656 yards are
3.5 represents 3 racks as 0.5 racks is insignificant
Therefore, 3 racks can be built from 5656 yards