# A ladder on the p

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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