Two vertical poles 20m and 30m high are 60m apart.A rope is to be attached from the top of one pole to a point on the ground halfway between the poles and then to the top of the other pole.How long a rope is needed?

Answer 1

one triangle is 20 by 30
the other is 30 by 30

sqrt(30^2+30^2) + sqrt(20^2+30^2)