Question

please answer guys 2nd question

Answer 1

Answer:

Step-by-step explanation:

D=2r

R=d/2

30.5÷2=r

Now area of a circle is

πr²=3.14×30.5/2

47.885cm₂²

Answer 2

Answer:

Step-by-step explanation:

given - diameter = 30.5

by using the formula pi r square

radius = 30.5/2 =15.25

15.25*15.25*3.14= 730.24