Find the area of the circle a. 48.25 sq. in.
b. 62.8 sq. in.
c. 88.23 sq. in.
d. 78.5 sq. in.

Area of a given circle the for is πr² where r is the radius but from the question we only have diameter. to get our radius we divide diameter by 2. which is 10/2=5

Π×5²=78.54m²

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.