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ANSWER

EXPLANATION
The term of the sequence are;

The first term of the sequence is,

The common ratio is


The sequence is given by the formula

When we substitute the values into the formula we get,

The correct answer is A
Answer:
smallest number of chickens= 3
Step-by-step explanation:
In this question the given formation is:
two chickens in front of a chicken
the total number of chickens are 3
two chickens behind a chicken
the total number of chickens are 3
a chicken between two chickens
the total number of chickens are 3
So, the smallest number of chicken that can be required to make this formation will be 3.
So, if we consider that the chickens are walking in a straight line, two (2nd and 3rd) chickens will be behind the 1st chicken, two chickens( 1st and 2nd) will be in front of the last (3rd) chicken and one (2nd) chicken is in the middle of two (between 1st and 3rd) chicken.
20 inches longest for day