Answer:
About 11.2 ft
Step-by-step explanation:
Use the pythagorean theorem
a squared + b squared= c squared
5^2+ 10^2= c^2
25+100=c^2
125=c^2
Square root both sides
c= plus or minus about 11.18, but the answer has to be positive because this is a real life situation and a ladder cannot be -11 feet long.