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The shadow of a tower standing on a level plane is found to be 50m longer when sun's altitude is `30^@` then when it is `60^@.` Find the height of tower.

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SL ARORA-Units and Measurements-Exercise
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  6. Express an acceleration of 10ms^(-2) in km h^(-2)

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  9. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  10. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  11. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  12. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  13. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  14. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  15. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  21. The angle of elevation of the top of a hill is 30^(@) from a point on ...

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