Home Maths Trigonometrical Equations and in Equations, Properties of Triangles, Height and Distance JEE Main 2021 - ( Height and Distance ) Two poles, AB of length a metres and CD of l…
Maths Trigonometrical Equations and in Equations, Properties of Triangles, Height and Distance JEE Main 2021 - ( Height and Distance ) Single Correct MCQ
Published on: August 13, 2026

Two poles, AB of length a metres and CD of length a + b(b ≠ a) metres are erected at the same horizontal level with bases at B and D. If BD=x and , then:

A
x 2 + 2(a + 2b)x − b(a + b) = 0
B
x 2 + 2(a + 2b)x + a(a + b) = 0
C
x 2 − 2ax + b(a + b) = 0
D
x 2 − 2ax + a(a + b) = 0

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The correct answer is:
C

⇒ x 2 − 2ax + ab + b 2 = 0

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