Set Up and Solve an Equation $\frac { 5 } { 8 }$

Multiple Choice

Set up and solve an equation. Round to the nearest tenth. A $\frac { 5 } { 8 }$ -inch garden hose fills a child's pool in 1 hour. A $\frac { 1 } { 2 }$ -inch garden hose fills a child's pool in 1.2 hours. How long will it take to fill the pool if both hoses are used at once?

A) 0.4 hr
B) 0.5 hr
C) 1.8 hr
D) 5.5 hr
E) 4.5 hr