There are two circles, big and small. The area difference between them is 62.8 square decimeters, and the radius of the big circle is 1.5 times that of the small circle. Then, what are the areas of the two circles?

There are two circles, big and small. The area difference between them is 62.8 square decimeters, and the radius of the big circle is 1.5 times that of the small circle. Then, what are the areas of the two circles?

The radius of the big circle is 1.5 times that of the small one
Then the area of the big circle is 1.5 × 1.5 = 2.25 times that of the small circle
The big circle has more area than the small one
2.25-1 = 1.25 times
What is the area of a small circle
62.8 △ 1.25 = 50.24 square decimeter
What is the area of the great circle
50.24 × 2.25 = 113.04 square decimeter