A tree is 8km due south of a building. Kofi is standing 8km west of the tree. How far is Kofi from the building?
-
A.
4√2km -
B.
8km -
C.
8√2km -
D.
16km
Correct Answer: Option C
Explanation
(x^2 = 8^2 + 8^2)
(x^2 = 64 + 64 = 128)
(x = sqrt{128})
= (8sqrt{2}) km