A truck travels beneath an airplane that is moving 159 km/hr at an angle of 33 degrees to the ground. How fast must the truck travel to stay beneath the airplane? Choose the correct option for the speed of the truck to stay beneath the airplane:
a) 129.6 km/hr
b) 143.2 km/hr
c) 156.9 km/hr
d) 167.3 km/hr
