exam Maths Puzzle Numerical Ability

Find the surface area of a cone with height of 21 cm. and radius of 21cm. Express the answer in terms of pie.

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A college survey was taken to determine where students study. Of 107 students surveyed, 67 studied in the library, 55 studied in the student union, 21 studied in both the library a Could you please help me solve this quesion?:

Icebergs are formed when part of a freshwater glacier falls into the sea. The density of the iceberg is less than the density of t