The area of square field is 625 sq km. How long will a horse to run around it at a speed of 10 km/h?

6 hrs

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10 hrs

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8 hrs

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7 hrs

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Solution

The correct option is B 10 hrs
Each side of the square field = $\sqrt{625} k m$
= 25 km
$∴$ Perimeter of the square field = $4 \times 25 k m$
= 100 km.
Time taken by the horse to run around the field = $\frac{D i s t a n c e}{S p e e d} = \frac{100 k m}{10 k m / h r} = 10$ hr

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35 m

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