IBPS RRB Office Assistant 2018 Paper

Given, circumference of circle = 66 cm
2πr = 66 (where r is the radius of circle)
⇒ 2×

22

7

×r=66
⇒ r=

66×7

2×22

⇒r=

21

2

‌cm
According to the question,
Radius of circle = 2 x side of square

21

2

=2× side of square
∴ Side of square =

21

4

‌cm
Hence, area of square =(side)2
=(

21

4

)2=

441

16

=27.5625=28cm2