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Saturday, 31 October

JEE Main 2021 · MathsMultiple choiceSingle correctMediumMulti-step

JEE Main 3 August 2021, Shift 1, Maths Q79

Question 79 of 90 in this shift, Maths question 19 of 30, Section A.

A vertical pole consists of two portions, the lower being 13\frac{1}{3}rd of the whole. If the upper portion subtends an angle tan⁡−1(12)\tan^{-1}\left(\frac{1}{2}\right) at a point on a horizontal plane drawn through the foot of the pole and at a distance 40 m from it, then the height (in m) of the pole can be
  1. (1)36
  2. (2)35
  3. (3)40Official answer
  4. (4)60

Official answer

Option 3

NTA final key.

Chapter
Trigonometric Functions
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.