If the mass of earth and radius suddenly become `2` times and `1//4th` of the present value, the length of the day becomes

If the mass of earth and radius suddenly become 2 times and 1/4 th of the present values the length of the day becomes

If earth suddenly contracts to 0.5 times of its present radius, then the length of the day becomes

If the Earth shirnks such that its density becomes 8 times to the present value, then the new during of the day in hours will be

If the earth shrinks such that its density becomes 8 times to the present values, then new duration of the day in hours will be

If the earth shrinks such that its density becomes 8 times to the present values, then new duration of the day in hours will be