একটি মই দেয়ালের সাথে হেলান দিয়ে অনুভূমিক ভূমির সাথে একটি কোণ θ তৈরি করে, যেখানে tan θ = \(\frac{15}{8}\)। যদি দেয়াল থেকে মইয়ের উপরের অংশের উচ্চতা 30 মিটার হয়, তাহলে দেয়াল থেকে মইয়ের গোড়ার দূরত্ব (মিটারে) নির্ণয় করুন।

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 05 Jun, 2025 Shift 1)
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  1. 16
  2. 14
  3. 20
  4. 18

Answer (Detailed Solution Below)

Option 1 : 16
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প্রদত্ত:

tan \(\theta = \frac{15}{8}\)

ভূমি থেকে মইয়ের উচ্চতা (বিপরীত দিক) = 30 মি

ব্যবহৃত সূত্র:

tan \(\theta = \frac{\text{উচ্চতা}}{\text{ভূমি}}\)

\(\Rightarrow \text{ভূমি} = \frac{\text{উচ্চতা}}{\tan \theta}\)

গণনা:

qImage686b76a013bfbf0b3e1a4e26

tan \(\theta = \frac{\text{উচ্চতা}}{\text{ভূমি}}\)

\(\frac{15}{8}\) \( = \frac{\text{30}}{\text{ভূমি}}\)

⇒ ভূমি = \(\frac{30}{\frac{15}{8}} = 2 × 8 = 16\) মি

∴ সঠিক উত্তর হল 16 মিটার।

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