You could also in 4 hours visit Eiffel Tower, have lunch at Eiffel Tower, visit one first class museum nearby.
Start from Trocadero metro station (marker 1 on map) on metro line 6 and 9. Enjoy the spectacular view of the Eiffel Tower from Palais de Chaillot. Walk down to the Eiffel Tower (15 minutes) across lovely Palais de Chaillot Gardens and Iena bridge. Visit the Eiffel Tower (2) and lunch.
Walk to Quai Branly Museum, devoted to primitive arts (3,15 minutes). Walk across scenic Passerelle Debilly (4) to Musee art moderne (6, 15 minutes). Finish at Iena metro station and Musee Guimet (7, 10 minutes walk).