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There is a circular garden and a path runs outside it along its boundary. A man walks around it only once keeping close to the edge. His each step is 66 cm long and he takes exactly 400 steps to go around the garden. The diameter of the garden is (Use $$\pi = \frac{22}{7}$$)
The circumference is $$400 \times 66 = 26400$$ cm, that is 264 m. Since circumference $$= \pi d$$, the diameter is $$264 \times \frac{7}{22} = 84$$ m.
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