geometry(surface area)

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What is the lateral surface area of a cone with radius 19cm and slant height 11cm?
possible answers;
19picm^2
30picm^2
200picm^2
209picm^2

What is the lateral area of the square pyramid to the nearest whole number?

base 11m and slant 15m
possible answers;
165m^2
176m^2
330m^2
351m^2

Please help

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