Solve the Problem $39 ^ { \circ }$ the Surveyor Then Measures the Angle to the Top

Multiple Choice

Solve the problem.
-A surveyor standing 56 meters from the base of a building measures the angle to the top of the building and finds it to be $39 ^ { \circ }$ . The surveyor then measures the angle to the top of the radio tower on the building and finds that it is $49 ^ { \circ }$ . How tall is the radio tower?

A) $19.07 \mathrm {~m}$
B) $9.87 \mathrm {~m}$
C) $6.78 \mathrm {~m}$
D) $7.02 \mathrm {~m}$