tolong kerjakan beserta caranya

F = K q1q2/r²

F = 9.10⁹ . 4 . 10⁻⁶ . 5 . 10⁻⁶/ 5.10⁻² . 5 . 10⁻² meter
F = (9 . 20 ) . 10 ⁹⁺⁴⁻⁶⁻⁶ / 25
F = [tex] \frac{180}{25}[/tex] . 10¹
F = 7,2 . 10
F = 72 N




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