SSC CGL 2022 PYQ — Question 59

The correct answer is Option 4. i.e. 24.5 cm.

Let the radii be R₁ and R₂ - 

Circumference of the first circle = $2\pi R_{1}$

$2\pi R_{1}= 198$

So,

⇒ $R_{1}= \frac{198\times 7}{2\times 22}$

 ⇒ $R_{1}=31.5$

Now,

Circumference of the second circle = $2\pi R_{2}$

$2\pi R_{2}= 352$

 ⇒ $R_{2}= \frac{352\times 7}{2\times 22}$

 ⇒ $R_{2}=56$

So,

The difference in the their radii = 56 - 31.5

The difference in their radii = 24.5 cm