If the angular size of the moon in the sky is 30 arc-minute, and the angular size of the sun in the sky is 32 arc-minute, what kind of solar eclipse would an earth-based observer witness, assuming the observer is perfectly aligned with the sun and moon?

The answer is annular solar eclipse. This starts when the Moon houses the Sun's midpoint, leaving the Sun's noticeable outside edges to make a “ring of fire” or annulus in the opposite direction of the Moon. The ring of fire results the all-out stage of an annular solar eclipse. Solar eclipses occur when the Moon companies a sleuth on Earth.

mass and volume are the answers you are looking for

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.