exam Maths Puzzle Numerical Ability

The volume of a can of soup is 144 PI inches cubed. The radius of the can is 6 inches. What is the height of the can?

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exam Other Question

Simplify the expression (m^6)^-2/3 and write your answer using a positive exponent. A garden area is 30ft long and 20 ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft^2, what is the width of the path?

No clue how to even come up with equation - please help!