Answer
$$11.6\ m^3 .$$
Work Step by Step
Since $1 m=1.09 yd$, then we have
$$15\ yd^3 =\frac{ 15}{1.09^3}\ m^3= 11.6\ m^3 .$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.