JEE Main 2021 (31 Aug, Shift 1) Maths Q79: A vertical pole…

Question

A vertical pole fixed to the horizontal ground is divided in the ratio

3:7

by a mark on it with lower part shorter than the upper part. If the two parts subtend equal angles at a point on the ground 18 m away from the base of the pole, then the height of the pole (in meters) is :

(1) $12\sqrt{10}$ Official answer
(2) $8\sqrt{10}$
(3) $6\sqrt{10}$
(4) $12\sqrt{15}$

Official answer

Option 1

NTA final key.

Accepted Answer

Option 1: $12\sqrt{10}$

Answer

$12\sqrt{10}$

Answer

$8\sqrt{10}$

Answer

$6\sqrt{10}$

Answer

$12\sqrt{15}$

JEE Main 31 August 2021, Shift 1, Maths Q79