Question

Someone please help me answer this!

Answer 1

72 mi is the answer.

Explanation:

a = 30 mi

b = ?

c = 78 mi

According to the Pythagoras theorem,

a² + b² = c²

30² + b² = 78²

900 + b² = 6084

b² = 6084 - 900

b² = 5184

b = 72 mi

∴ the eastbound airplane has travelled 72 mi.