\textbf{162-} Suppose a planet whose radius is half the radius of Earth and whose mass is $\dfrac{1}{4}$ the mass of Earth. The gravitational acceleration on the surface of this planet will be how many times the gravitational acceleration on the surface of Earth?
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(1) $\dfrac{1}{4}$ \hspace{2cm} (2) $\dfrac{1}{2}$ \hspace{2cm} (3) $1$ \hspace{2cm} (4) $2$
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