exam Maths Puzzle Numerical Ability

please help me solve this math problem.

the base of a cylinder is a right triangle topped by a 60 sector of a circle, as shown. The radius is 4 meters. If the dementions are in

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exam Other Question

Evaluate 7 1/2 of 15,500 + 12 1/2 of 15,500. Find the constant term of the expansion of (x-2/x^3)^12.

I know that the constant term is independent of an x-value. I'm really confused as to how the k term is determined in or