A manometer is rotated around one leg, as shown. The difference in elevation between the liquid surfaces

Question:

A manometer is rotated around one leg, as shown. The difference in elevation between the liquid surfaces in the legs is 20 cm. The radius of the rotating arm is 10 cm. The liquid in the manometer is oil with a specific gravity of 0.8. Find the number of g’s of acceleration in the leg with greatest amount of oil.