Aptitude Questions Practice Question and Answer

Q: The top and bottom of a tower were seen to be at angles of depression 30° and 60° from the top of a hill of height 100 m. Find the height of the tower ? 2091 1

  • 1
    42.2 mts
    Correct
    Wrong
  • 2
    33.45 mts
    Correct
    Wrong
  • 3
    66.6 mts
    Correct
    Wrong
  • 4
    58.78 mts
    Correct
    Wrong
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Answer : 3. "66.6 mts"
Explanation :

Answer: C) 66.6 mts Explanation: From above diagramAC represents the hill and DE represents the tower Given that AC = 100 m angleXAD = angleADB = 30° (∵ AX || BD ) angleXAE = angleAEC = 60° (∵ AX || CE) Let DE = h Then, BC = DE = h, AB = (100-h) (∵ AC=100 and BC = h), BD = CE tan 60°=AC/CE => √3 = 100/CE =>CE = 100/√3 ----- (1) tan 30° = AB/BD => 1/√3 = 100−h/BD => BD = 100−h(√3)∵ BD = CE and Substitute the value of CE from equation 1 100/√3 = 100−h(√3) => h = 66.66 mts The height of the tower = 66.66 mts.

Q: एक रेलगाड़ी की लम्बाई 300 मीटर हैं। वह 72 किमी प्रति घंटे की रफ्तार से एक खम्भे को कितनी देर में पार कर जाएगी? 2019 0

  • 1
    18 सैंकण्ड
    Correct
    Wrong
  • 2
    15 सैंकण्ड
    Correct
    Wrong
  • 3
    12 सैंकण्ड
    Correct
    Wrong
  • 4
    20 सैंकण्ड
    Correct
    Wrong
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Answer : 2. "15 सैंकण्ड"

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Answer : 2. ""

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Answer : 2. "16:25"

Q: 250 मीटर लम्बी एक ट्रेन एक खम्भे को 15 सैंकण्ड में पार करती है। ट्रेन की गति किमी/घंटा में क्या है? 1978 0

  • 1
    90
    Correct
    Wrong
  • 2
    45
    Correct
    Wrong
  • 3
    70
    Correct
    Wrong
  • 4
    इनमें से कोई नहीं
    Correct
    Wrong
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Answer : 4. "इनमें से कोई नहीं"

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Answer : 4. "230 मीटर"

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