Size Riddles

Google Riddle - The Coin Tower
Riddle:
If you pile up coins one on top of another until they get as high as the Empire State Building - would you be able to fit them all into one average sized room? (The 'Google Riddles' are interview questions those who wish to get hired were asked).
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A Fast Grower
Riddle:
There is a creature which could double its size every day. So, if the creature is put in a tank then it will fill the tank in 10 days. How many days would it take for the creature to fill a half and how many days to fill a quarter of the tank?
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