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A man on the top of a tower, standing on the Sea-shore, finds that a boat coming towards him takes 10 minutes for the angle of depression to,change from `30^@` to `60^@`. How soon the boat reach the sea-Shore?
समुद्र के किनारे एक टॉवर के शीर्ष पर खड़ा व्यक्ति यह पाता है कि उसकी तरफ आ रही नाव का अवनमन कोण 10 मिनट में `30^@` to `60^@` हो जाता है। नाव समुद्र के किनारे देर में आ जाएगी?

A

5 minutes

B

7 minutes

C

10 minutes

D

15 minutes

Text Solution

Verified by Experts

The correct Answer is:
A
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A man on the top of a tower,standing on the seashore,finds that a boat coming towards him takes 10 minutes for the angle of depression to change from 30o to 60o. Find the time taken by the boat to reach the shore from the position.

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KIRAN PUBLICATION-TRIGONOMETRY -TYPE -IV
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