The Castle Garden

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A square castle graden is 34 yards wide by 34 yards long and comprises a 10 yard wide circular pond in the centre surrounded by a circular 10 yard wide grass lawn which is surrounded by a circular 2 yard wide gravel path. The 4 corners from the outer hedge to the outer edge of the gravel path is planted in flowers.
Find (a) The total area planted in flowers (b) The distance walked by the gardener when cutting the lawn with a 24 inch wide lawnmower.