The bearing of two points Q and R from a point P are 030° and 120° respectively, lf /PQ/ = 12 m and /PR/ = 5 m, find the distance QR.
-
A.
13m -
B.
11m -
C.
9m -
D.
7m -
E.
5m
Correct Answer: Option A
Explanation
x(^2) = 12(^2) + 5(^2)
x(^2) = 144 + 25
x(^2) = 169
x = (sqrt{169}) = 13m.