5 years ago in SSC CGL: 9th September 2016

Question 71.A boat is moving away from an observation tower. It makes an angle of depression of 60° with an observer's eye when at a distance of 50m from the tower. After 8 sec., the angle of depression becomes 30°. By assuming that it is running in still water, the approximate speed of the boat is एक नाव किसी प्रेक्षण टावर से दूर जा रही है। जब वह टॉवर से 50 मीटर की दूरी पर है तो वह प्रेक्षक की द्रष्टि मे 60° का अवनमन कोण बनाती है। 8 सेकण्ड़ के बाद अवनमन कोण 30° का हो जाता है, तो यह मानते हुए कि नाव ठहरे हुए पानी में चल रही है। नाव की लगभग चाल (स्पीड ) बताइए ?

[A] 33km/hr<br>33 कि.मी. /घंटा
[B] 42km/hr<br>42 कि.मी./घंटा
[C] 45km/hr<br>45 कि.मी./घंटा
[D] 50km/hr<br>50 कि.मी./घंटा

Overall Stats

Attempted 6
Correct 3
Incorrect 1
Viewed 2

Tushant Daf - 1 year ago

Tushant Daf from Pune, India is saying 45km/hr
45 कि.मी./घंटा

Nazia Sayed - 3 years ago

Nazia Sayed from Mumbai, India is saying 45km/hr
45 कि.मी./घंटा

ashi yadav - 3 years ago

ashi yadav from Auraiya, India is saying 45km/hr
45 कि.मी./घंटा

tejaswini - 3 years ago

tejaswini from Vijayawada, India is saying 42km/hr
42 कि.मी./घंटा

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