Question

a radar whose effective range is 500m is positioned 180m from a straight road. what length of the road is under radar surveillance ?

Answer 1

x=sqrt(500^2-180^2)

Answer 2

the answer is different to the answers in the book, it is 933, but i dont know how you get that anser

Answer 3

with the pythagoras' method it turns out to be 466

Answer 4

ohhh sry!! you have to double up what u find with x. note that it is both ways protected by the radar