Rahim's father has five sons naely Ten , Twenty , Thirty and Forty. what is the name of the fifth son?
A
Fifty
B
Forty Five
C
One
D
None of these
Correct Answer: None of these
দেওয়া আছে, πr2 = 45r2 = 453.14r2 = 14.33r = 14.33 = 3.78