Answer :
Let the distance of the point on ground be x m from the 3 m pole.
⇒ This distance of the point on ground from 4 m pole is (5-x) m. (∵ the distance between the poles is 5 m.)
Now the length of the rope is AB + BC.
By Pythagoras Theorem
AB2 = AD2 + DB2
⇒ AB2 = 32 + x2
⇒
Similarly,
Now, let the length of rope be a R
⇒ R = AB + BC
⇒
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