Solution: Find the minimum surface area of the tank

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Solution: How long should the printed lines be in order to minimize the amount

Solution: What is the ratio of the width of the rectangle to the total height

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Solution: What is the size of the largest field that can be fenced this way

Solution: Find the dimensions of the largest field that can be enclosed

Solution: What is the length of the field parallel to the building

Solution: How far from C should he land if he can row at the rate of 6 Kph