Answer
Peter ($180.34\text{ cm}$) is taller than Paul ($176\text{ cm}$).
Work Step by Step
We convert both heights to centimeters.
Peter's height:
$5\text{ ft} 11\text{ in}=5\times 12+11=71\text{ in}$
$71\text{ in}\times 2.54\text{cm/in}=180.34\text{ cm}$
Paul's height:
$176\text{ cm}$
As $180.34>176$, Peter is taller.
