Question

The main mast of a fishing boat is supported by a sturdy rope that extends from the top of the mast to the deck. If the mast is 20ft tall and the rope attached to the deck is 15ft away from the base of the mast,how long is the rope?

Answer 1

25
a^2+b^2=c^2
20^2+15^2=c^2
400+225=c^2
625=c^2
**square root both sides**
c=25