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Math
Riddle of the Sphinx
Sphinx

 
Riddle 2: The Pharos of Alexandria
For more than a thousand years the lighthouse known as the Pharos of Alexandria burned a huge bonfire that helped safely guide ships into the harbor. At the base of the lighthouse was a fortress with over 300 rooms. Not only was the Pharos a lighthouse but it also served as a base for Egyptian soldiers.

At its very peak, the Pharos stood more than 400 feet high. Estimate how high the lighthouse would be in meters.

a. between 120 and 125
b. 1200
c. 160
d. 135