Consider two planets a and b. the mass of planet b is 0.012 times the mass of planet a and its radius is 0.3 times the radius of planet a. if the acceleration due to gravity at the planet a is 10 m/s2 , calculate the corresponding value at planet b.

Ga = Ma G/Ra^2
gb = [Mb/Ma  x (Ra/Rb) ^2] ga    
gb = [(0.012 * (1/0.3)^2] * 10
= 1.33 m/s^2

Ithink your answer is d

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached