exam Maths Puzzle Numerical Ability

A conical shaped container is made from a circular piece of paper.It has a base radius of 9cm and a height of 12cm. What is the circumference of the original circle in centimetres?

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exam Other Question

a man purchased a number of balloons, each of the same price, for a total of $720. he sold them all at $40 each, thus realizing a profit equal to his 8 balloons. how many did he buy?

can you solve this using the quadratic equation??? thanks!! Determine the equation of the line passing through the centres of the circles
(x-2)^2+(y+5)^2=16 and 3x^2+3y^2+24x-6y-24=0.