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:
D i think
Step-by-step explanation:
Answer:
you multiply im pretty sure
Step-by-step explanation:
Yes, you do need to stop for gas. A quarter of 12 gallons would equal 3 gallons. If one gallon can take you 25 miles, 3 gallons will take you 75 miles. If you need to drive for 90 miles, you don't have enough gas.