# Ans= 50 how?

A post 30m high is supported by wire attached to its top and a point on a level 40 meters from the foot of the post. Then length of the wire is

h2=a2+b2

https://en.wikipedia.org/wiki/Pythagorea...

now you know about 3, 4 , 5 triagles

You never heard of the Pythagorean Theorem? a^2 + b^2 = c^2. You've been given a and b.

x^2+y^2=r^2

r=sqrt(x^2+y^2)

r=sqrt(30^2+40^2)

r=sqrt(2500)

r=50

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