Question

The diameter of a circle, whose area is equal to the area of sum of two circles with the radius 12cm and 5 cm is:

Answer 1

Answer:

D = 10$\sqrt{5}$

Step-by-step explanation:

π R² = π r²1 + π r²2

  R² = r²1 +  r²2

  R² = 120 + 5

  R² = 125

R = $\sqrt{5}$

R = 5$\sqrt{5}$

2R = D = 10$\sqrt{5}$