Solve the Problem $\frac { 16 } { 63 }$ Hours
B) 1 Hour
C)

Multiple Choice

Solve the problem.
-A contractor finds that it takes Julie 9 hours to construct a wall of a certain size. It takes Leann 7 hours to construct the same wall. How long would it take if they worked together?

A) $\frac { 16 } { 63 }$ hours
B) 1 hour
C) $3 \frac { 15 } { 16 }$ hours
D) 16 hours