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"Sears Tower in Chicago is 1559 feet tall. What is its height in kilometers?"
It's a three step dimensional analysis problem. ;p
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1 ft = 30.48 cm
so 1559 ft = 1559 * 30.48 cm = 47518.32 cm
1 cm = 1/100000 km
47518.32 cm = 47518.32 * (1/100000) km = 0.48 km approx.
1559 ft = 0.4752 km
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