exam Maths Puzzle Numerical Ability

Find the surface area of a cylinder if the height is 9 meters and the radius of a base is 6 meters. Use pie( no way to type sign) equals 3.14 and round to the nearest whole number.

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please help me sovle this question (y-24=-7) To Whomever can assist, Thank you!
I need to use either the substitution method or the elimination by addition method to solve the system, whichever seems more appropriate.

5x - 2y = 1
10x - 4y = 7