Answer:
AB=20
Explanation:
Given:
r= 14.5
AB cuts r=14.5 in two parts one parts length=4
remaining length, x = 14.5 - 4 =10.5
draw a line from center of circle to point A making right angled triangle
Now hypotenuse=r=14.5
and one side of triangle=10.5
Using pythagoras theorem to find the third side:
c^2=a^2+b^2
14.5^2=10.5^2+b^2
14.5^2-10.5^2=b^2
b^2=100
b=10
AB=2b
=2(10)
=20
Hence length of cord AB=20!