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JAMB UTME

I. The earth is not spherical but elliptical in shape.
II. Variation in latitude and longitude.
III. Rotation of the earth on its axis.
IV. Variation in the density of the earth.
On which combination of the above does the weight of an object vary on the earth's surface?

A.
I, II and III only.
B.
I, II, III and IV.
C.
I and II only.
D.
II, III and IV only.

Answer: A

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