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Question

Question 81

The earth rotates 360 about its axis in about 24 hours. By how much degree will it rotate in 2 hours?

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Solution

Given, earth rotates 360 about its axis in about 24 hours i.e.

Rotation by earth in 24 hours = 360

Using unitary method in which first we find the value of one unit and then the value of the required number of units.
Rotation in 1 hours = 36024
Rotation in 2 hours = 36024×2 = 30
Hence, Earth will rotate by 30 in 2 hours.


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