There are two concentric circles of radii 13cm and 12cm. The length of the chord of the outer circle which touches the inner circle is
Option
a. 10cm
b. 12cm
c. 12.5cm
d. 14cm

• outer circle radus=13cm Now,the height=radius of inner circle=12cm
  so, length of chord=2*((13^2-12^2)^1/2)=2*5=10cm
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