Question
 Seoul is the capital of which
country?Solution
Seoul is the capital and largest metropolis of the Republic of Korea also known as South Korea. Seoul is the world's 16th largest city, and forms the heart of the Seoul Capital Area.
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A boat travels 30 km upstream and 40 km downstream. The speed of the stream is 5 km/h, and the boat’s speed in still water is 15 km/h. How much time d...
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