Question: A ball was floating in a lake when the lake froze. The ball was removed without breaking the ice, leaving a hole 20 cm across

A ball was floating in a lake when the lake froze. The ball was removed without breaking the ice, leaving a hole 20 cm across at the top and 4 cm deep.

a) What was the radius of the ball?

b) If the hole is filled with sand, what is the volume of the sand? Round your final answer to one decimal place.

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