If the diametre of a circle is increased by40% what is the increase area of the circle Ans. 96%

If the diametre of a circle is increased by40% what is the increase ar

1.	If the diametre of a circle is increased by40% what is the increase area of the circle Ans. 96%
Answer» The area of a circle is determined by the formula (pi)r2.\xa0The best way for you to approach this problem is by using a sample diameter. Let\'s use 4, since it\'s easy.\xa01: Multiply 4 by 0.40= 1.6. So your new diameter is 5.6.\xa02: Divide the diameter by two to get the radius => 2.8.\xa03: Square the radius => 7.84. Now multiply by pi, using 3.14 ==> 24.62.\xa04: Find the original area of the circle ==> 22*3.14 ==> 12.56.\xa05: 24.62/12.56=1.96 ==> The new is 196% of the original, so the area changes by 96%.