500 mph east relative to the ground. A Cessna is flying at 150 mph 60° north of west relative to the ground. What is the Cessna's speed relative to the 747? A 634 mph B 578 mph C 590 mph D 444 mph E 610 mph

option C

Explanation:

given,

Flight speed in east = 500 mph

Cessna flying = 150 mph

At an angle = 60°  N of W

angle, θ = 180° - 60° = 120° N of W

Relative velocity  between them

now,

magnitude of the relative velocity

   v = 589.5 mph

Relative speed of the Cessna's = 590 mph.

Hence, the correct answer is option C