Q.) A horse take seconds to complete a round around a circular field. If the speed of the horse was 66 m/sec, then the radius of the field is,[Given ]

(a) 25.62 m

(b) 26.52 m

(c) 25.26 m

(d) 26.25 m

Solution:

Speed of the horse was 66 m/sec.

total distance travelled in seconds = X 66 = 165 metres

This will be equal to the circumference of the Circle.

= 165

=> = 165

=> r = = 26.25 m

Hence , Option(d)

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