Question

The earth requires 24 hours for one rotation. In one hour,(i) 5 longitudes will face the sun(ii) 10 longitudes will face the sun(iii) 15 longitudes will face the sun(iv) 20 longitudes will face the sun

Answer 1

The plane of revolution of the earth with respect to the sun aligns with the equator of the earth.

This happens at the autumnal and vernal equinoxes.

When an hour begins, half of the earth's meridians of longitude are in the sunlight.

When this hour passes, the earth rotates through longitudes of fifteen degrees.

Hence the answer equals, 180+15= 195°.

Answer 2

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