Q. 94.2( 14 Votes )

A ladder on the p

Answer :


Let AB be the ladder, i.e. AB = 20 m and PQRS be the platform.


In the above figure, clearly


PQ = RS = CD = height of platform = 2 m


Maximum height ladder can reach = BC + CD


Now,


Maximum value of ∠BAC = 70°


In right-angled triangle ABC,





⇒ BC = 18.8 m


Maximum height ladder can reach = BC + CD


= 18.8 + 2 = 20.8 meters


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