Question

HELP ASAP!!!

1: What is the surface area of a sphere with a radius of 4 meters rounded to the nearest square meter
A: 50 m^2
B: 101 m^2
C: 201 m^2
D: 268 m^2

2: What is the volume of a sphere with a radius of 6 meters rounded to the nearest square meter?
A: 905 m^3
B: 679 m^3
C: 452 m^3
D: 226 m^3

Answer 1

Q1)
the surface area of the sphere can be calculated using the following equation
Area = 4πr²
where r = radius
π = 3.142
radius of the sphere = 4 m
substituting radius in the area equation
Area = 4 x 3.142 x 4²
= 201.08 m²
when rounded off to nearest sq.meter , 201.08 ≈ 201
answer is C. 201 m²

Q2)
volume of the sphere can be calculated from the following equation
V = 4/3 πr³
radius of sphere = 6 m
π = 3.142
V = 4/3 x 3.142 x 6³
= 904.8 m³
rounded off to nearest sq. meter
904.8 ≈ 905 m³
correct answer is A