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The length of the shadow of the vertical...

The length of the shadow of the vertical tower on level ground increases by 10m when the altitude of the sun changes from `45^@` to `30^@`.The height of the tower is:
समतल भूमि पर खड़ी मीनार की छाया की लंबाई 10 मीटर तक बढ़ जाती है जब सूर्य की ऊँचाई `45^@` से `30^@` तक बदल जाती है। टॉवर की ऊंचाई है:

A

12 .56 metre

B

13 . 65 metre

C

14 . 65 metre

D

16 . 65 metre

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The correct Answer is:
B
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The length of the shadow of a vertical pole on the ground is 18m. If the angle of elevation of the sun at that time is theta , such that cos theta= 12/13 , then what is the height (in m) of the pole? भूतल पर एक अधोलंब खम्भे की परछाईं की लंबाई 18 मी है। यदि उस समय सूर्य की ऊँचाई का उन्नयन कोण ऐसे है , जैसे कि cos theta= 12/13 है, तो खम्भे की ऊँचाई (ऊँचाई) क्या है?

The length of the shadow of a vertical pole on the ground is 36m. If the angle of elevation of the sun at that time is theta , such that sec theta= 13/12 ,then what is the height (in m ) of the pole ? भूतल पर एक अधोलंब खम्भे की परछाईं की लंबाई 36 मी है। यदि उस समय सूर्य की ऊँचाई का उन्नयन कोण ऐसे है , जैसे कि sec theta= 13/12 है, तो खम्भे की ऊँचाई (ऊँचाई) क्या है?

The length of the shadow of a vertical pole on the ground is 24m. If the angle of elevation of the sun at that time is theta , such that sin theta= 5/13 , then what is the height of the pole? / एक लंबवत खंभे की भूमि पर परछाई की लंबाई 24 मीटर है | यदि उस समय सूर्य के उन्नयन का कोण theta इस प्रकार है कि sin theta= 5/13 है, तो खंभे की ऊंचाई ज्ञात करें |

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