Question: 2. A planimeter with a fixed tracing arm 4.00 in long has a wheel circumference of 2.50 in. The instruction sheet for the instrument is

2. A planimeter with a fixed tracing arm 4.00 in long has a wheel circumference of 2.50 in. The instruction sheet for the instrument is lost, so that the area of the area circle is not known. To determine the area of the zero circle, a certain area is measured with the pole both outside and inside the area. With the pole inside the area the wheel records 13.01 revolutions. Calculate the area of the zero circle and the reading of the planimeter when it is used to trace out a circle and the reading of the planimeter when it is used to trace out a circle with a 9 in radius

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