book Maths Puzzle Numerical Ability

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2) The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Sup

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book Other Question

The book is very vague about this. Find the common difference of the sequence in which the first term is 5 and the 11th term is -10. Any help appreciated.
jp
Given central angle EOF=120 degrees and radius is 12 meters find:
A. measure of arc EF
B. the arc length EF
C. Area of the sector