30.41592653 to work this out you need to times your diameter by Pi in the case 20 x Pi
The required value is 
Step-by-step explanation:
Weight of ants = 
Weight of elephant= 
We need to find, the total weight of about how many ants equals to the weight of an oversized elephant.
The equation given is:

We need to find a:
Solving:

So, the required value is 
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Answer: 5.4ft!
Step-by-step explanation:
Multiply 250 by 120 and the answer is 300,000ft2