The minute hand of a watch is 1.5 cm long. The distance the tip moves in 40 minutes is (use π = 3.14):

40 minutes = 2/3 of a revolution → θ = (2/3) × 2π = 4π/3 radians. Distance l = rθ = 1.5 × (4π/3) = 2π cm = 2 × 3.14 = 6.28 cm.