A circular logo is enlarged to fit the lid of a jar. The new diameter is 50 per cent larger than the original. By what percentage has the area of the logo increased?	Choose one.
A) 50
B) 80
C) 100
D) 125
E) 250
Let old diameter be 4 , so radius is 2   Old area = 4π   New diameter is 6 , so radius is 3   New area = 9π   Increase in area is 5π   % increase in area = 5/4*100   So, % increase is 125%   Answer will be (125)
<result>D</result>
A circular logo is enlarged to fit the lid of a jar. The new diameter is 50 per cent larger than the original. By what percentage has the area of the logo increased?