It’s the 3rd one hopefully this helps
Find: 1) the area of a circle of diamter 5 feet and radius 5/2 feet.
2) the area of a triangle with height 4 ft and base 6 ft.
Add these 2 results together: pi*(5/2)^2 + (1/2)(6)(4) ft
The trick here is to recognize basic shapes, find their areas separately and add the results.
Answer:
r = 35.18 mm
Step-by-step explanation:
We have,
The diameter of a reamed hole is 70.36 mm.
It is required to find the radius required to draw the hole.
The relation between diameter and radius is given by :
D = 2r
r is radius setting

So, the radius setting used to draw the hole is 35.18 mm.