Question

radii of two circle are 17 cm and 7 cm. Find the radius of the circle having area

equal to the sum of the areas of two circles.​

Answer 1

Answer:

√((17)^2 + (7)^2)

Step-by-step explanation:

π(r1)^2+π(r2)^2=π(r3)^2

Answer 2

Answer:

r= 18.4cm

Step-by-step explanation:

for 17cm

Area = π×r² = 3.14 ×17×17 = 907.9

for 7 cm

Area = π×r² = 3.14 ×7×7 = 153.9

now for third circle

Area 3 = Area 1 + Area 2

Area 3 = 1061.8cm²

for its radius

Area = π×r² = 1061.8

so

r² = 1061.8/π

taking square root on b/s

r= 18.4cm