Question

If the radius of the earth is suddenly contracts to half of its present value, then the duration of day will be of:

• A. 6 hours
• B. 12 hours
• C. 18 hours
• D. 24 hours.

Answer 1

Answer: (A)

6 hours

Answer 2

$T \propto R^{2},$ If radius becomes half than time period becomes ¼ of the previous value i.e. 24/4 = 6 hr