6 buah lampu masing² 60 watt menyala 2 jam, brp energi yg dibutuhkan?

=60x6x120=43.200watt

w = (60 x 6) 2
= 360 x 2
= 720 kwh = 720 x 60 = 43.200 watt
rumusnya = w = p x t