16,650
The LCM of 75, 120, and 315 is 12,600.
Highest common factor of 500 and 450 is 50.
90, 180, 270, 360, 450, 540, 630, 720, 810, 900 +90 . . .
30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, 420, 450, 480, 510, 540, 570, 600, 630, 660, 690, 720, 750, 780, 810, 840, 870, 900, 930, 960, 990
630 - 180 = 450
The LCM is 1800.
The LCM is 9000.
16,650
90, 180, 270, 360, 450, 540, 630, . . .
90, 180, 270, 360, 450, 540, 630 and so on.
First find the current, I = W/E, 450/120 = 3.75 amps. R = E/I, 120/3.75 = 32 ohms.
90, 180, 270, 360, 450, 540, 630 . . .
9000
90, 180, 270, 360, 450, 540, 630 +90 . . .
90, 180, 270, 360, 450, 540, 630, 720 +90 . . .
30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, 420, 450, 480, 510, 540, 570, 600, 630, 660, 690, 720, 750, 780.