Answer:
No, it's not.
Explanation:
First, find the circumference of the table:
C = 2πr
= 2 × 22/7 × 180/2
NOTE: Diameter/2 is equal to the radius because half of Diameter is a radius.
= 44/7 × 90
= 3,969/7
= 565.71 approximately 566cm²
Next, find how many guests can occupy a table:
566/70 = 8.08 approximately 8 guests.
Now, how many guests will be in 18 tables?
18 × 8 = 144 guests, but we need 145 guests, so it is not enough.