Answer:
The answer in the procedure
Step-by-step explanation:
we know that
The lateral area of a cone is equal to

where
r is the radius of the base
l is the slant height
we have


assume 
substitute the values

This value is an underestimate, because the assumed pi value is less than the real value
assumed value 
real value 
Instead i use pemdas so the answer to this problem would be 48
2 * 2 * 2 * 2
4 * 2 * 2
8 * 2
16
Negative numbers aren't considered in any of those categories.