Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.60106 \rm N, one at an angle 19.0^\circ west of north, and the other...

Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.60×106 rm N, one at an angle 19.0^circ west of north, and the other at an angle 19.0^circ east of north, as they pull the tanker a distance 0.610 rm km toward the north What is the total work done by the two tugboats on the supertanker?