Answer:
b. 6.93 m.
Step-by-step explanation:
We have been given triangle ABC and we are asked to find the measure of a.
We will use law of sines to solve our given problem.
, where a, b and c are opposite sides of angle A, B and C respectively.
First of all, we will find the measure of angle B using angle sum property.





Upon substituting our given values in law of sines we will get,






Therefore, the value of a is 6.93 meters and option 'b' is the correct choice.