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What must be the radius of a circular ru...

What must be the radius of a circular running path, around which an athlete must run 5 times in order to describe 1 km?

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The correct Answer is:
` r = 31.82`m
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SURA PUBLICATION-TRIGONOMETRY-EXERCISE 3.2
  1. Express each the angles in radian measure. 30^(@)

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  2. Express each the angles in radian measure. 135^(@)

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  3. Express each the angles in radian measure. -205^(@)

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  4. Express each the angles in radian measure. 150^(@)

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  5. Express each the angles in radian measure. 330^(@)

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  6. Find the degree measure corresponding to the radian measures. (8pi)/(...

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  7. Find the degree measure corresponding to the radian measures. (5pi)/(...

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  8. Find the degree measure corresponding to the radian measures. (2pi)/(...

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  9. Find the degree measure corresponding to the radian measures. (7pi)/(...

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  10. Find the degree measure corresponding to the radian measures. (10pi)/...

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  11. What must be the radius of a circular running path, around which an at...

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  12. In a circle of diameter 40 cm, a chord is of length 20 cm. find the le...

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  13. Find the degree measure of the angle subtended at the centre of circle...

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  14. What is the length of the are intercepted by a central angle of measur...

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  15. If in two circles, arcs of same length subtend angles 60^(@) and 75^(...

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  16. The perimeter of certain sector of a circle is equal to the length of...

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  17. An airplane propeller rotates 1000 times per minute. Find the number o...

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  18. A train is moving on a circular track of 1500 m radius at the rate of ...

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  19. A circular metallic plate of radius 8 cm and thickness 6 mm is melted ...

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