Question: Please solve and explain this question in details. 17a but i don't know why. 17. Suppose 3007 square metres of sheet metal is available to
Please solve and explain this question in details. 17a but i don't know why.

17. Suppose 3007 square metres of sheet metal is available to construct an open topped cylinder. Let r be the radius of the cylinder in metres and h the height in metres. What is the radius at which the volume of the cylinder is maximised? (a) r = 10 metres. (b) r = 12 metres. (c) r = 15 metres. (d) r = 18 metres
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