The total surface area of a hemisphere is 462 sq cm, what is its curved surface area? (Take π = $\frac{22}{7}$)

The total surface area of a hemisphere is 462 sq cm, what is its curved surface area? (Take π = $\frac{22}{7}$)
1). 616 sq cms
2). 154 sq cms
3). 308 sq cms
4). 462 sq cms

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