Question

Pls answer this question

Answer 1

There are two concentrated circles, whose area are 706.5 m² (big circle) and 314 m² (small circle) respectively.

Let the radius for the big circle be 'R' and the radius for the small circle be 'r' .

So, the area of the big circle=706.5 m²

πR²=706.5

22/7×R²=706.5

R²=706.5×7/22

R²=9891/44

R=√9891/√44

R=3√12089/22

R=14.99

So, the radius for the big circle is 14.99 m.

Now, we have to find the radius of the small circle.

Area of the small circle=314 m²

πr²=314

22/7×r²=314

r²=314×7/22

r²=1099/11

r=√1099/√11

r=√12089/11

r=9.99 m

So, the radius for the small circle is 9.99 m.