Answer:
ummm
Step-by-step explanation:
idk
The answer is 60. Just multiply 20 × 3.
Answer:
18π + 90
Step-by-step explanation:
The perimeter is the sum of quarter of the circumference and 2r , that is
P = 2πr + (45 + 45)
= 2 × π × 36 ×
+ 90
= 2 × π × 9 + 90
= 18π + 90
50 000 000
× 
= 6.4 ×
× 7.8125 × 
= (6.4 × 7.8125 ) ×
= 50 ×
= 50 000 000