Torque due to reaction forces from water jets Steps:

• Tube length is 1.5 m, pivoted at midpoint, so each end is 0.75 m from pivot.
• Each jet exerts 3 N horizontal force on tube in opposite directions, forming a force couple.
• Torque for a couple is F × d, where d is perpendicular distance between force lines of action.
• Without diagram, exact orientation (angle between tube and forces) is unknown, so d cannot be determined precisely. Not enough information.

Final answer: Not enough information.