\textbf{179.} If the magnitude of the electric field produced by a point charge at 30 cm is $1.6\times10^{4}\ \dfrac{\text{N}}{\text{C}}$ less than the magnitude of the electric field at 10 cm from it, the charge of that particle at a distance of 1 meter is how many coulombs?
(1) $90$ \quad (2) $120$ \quad (3) $180$ \quad (4) $240$