A circular logo is enlarged to fit the lid of a jar. The new diameter is 40 per cent larger than the original. By what percentage has the area of the logo increased? Select the correct option.
A) 50
B) 96
C) 100
D) 125
E) 250
Let old diameter be 4 , so radius is 2   Old area = 4π   New diameter is 5.6 , so radius is 2.8   New area = 7.84π   Increase in area is 3.84π   % increase in area = 3.84/4*100   So, % increase is 96%   Answer will be (96)
<result>B</result>
A circular logo is enlarged to fit the lid of a jar. The new diameter is 40 per cent larger than the original. By what percentage has the area of the logo increased?