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Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.50×106\rm N , one at an angle 10.0 degrees west of north, and the other at an angle 10.0 degrees east of north, as they pull the tanker a distance 0.810\rm km toward the north. What is the total work done by the two tugboats on the supertanker? Express your answer in joules, to three significant figures.

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