53. In the figure below, ΔACD is a right triangle, B lies on AC, and the measures of ∠DAC and ∠DBC are given. The length of AB is 10 yards. What is the approximate length, in yards, of CD ？

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Assuming that the value of CD is x, then the value of 10 plus x is three times the square root of x, and the value of x after solving this equation is 13.7. Choose C.