Question

AB and CD are two parallel chords.AB =18cm CD =24cm and diameter of given circle is 30cm. find BD?​

Answer 1

Answer:

Correct option is

C

13 cm

r

2

=x

2

+(5)

2

also, r

2

=(17−x)

2

+(12)

2

So, x

2

+(5)

2

=(17−x)

2

+(12)

2

x

2

+25=(17−x)

2

+144

⇒x=12

∴r

2

=144+25=169

⇒r=13cm

Answer 2

Answer:

r

2

=x

2

+(5)

2

also, r

2

=(17−x)

2

+(12)

2

So, x

2

+(5)

2

=(17−x)

2

+(12)

2

x

2

+25=(17−x)

2

+144

⇒x=12

∴r

2

=144+25=169

⇒r=13cm