The ice cap at the North Pole has an area of about and an average thickness of about 25...

The ice cap at the North Pole has an area of about and an average thickness of about 25 m. If all this ice melts, what will be the approximate effect on the Earth’s rotation rate? Hint? Assume the angular momentum of the ice cap is zero (since it is near the pole) and the water from the melted ice is distributed uniformly around the Earth’s surface. Express your answer as the fractional change in the rotation rate.