Question 970701
Area = 4 pi *r^2
1.44 area=4 pi *R^2
Ratio of second to first
1.44= (R/r)^2, where R is the new radius.

1.44 r^2+ R^2

Take the square root of both sides

1.2 r=R
Diameter=2r=2.4, but it is still a 20% increase, since radius and diameter are linearly related.

Percentage of increase of diameter is 20%