Question

Find the radius of the circle whose circumference is equal to the sum of the circumference of the circles having radii 15cm and 8cm​

Answer 1

Answer:

Step-by-step explanation:

r=2pi15+2pi8

2*22/7*15+2*22/7*8

660/7+352/7

1012/7

144.571

Answer 2

r1=15cm

r2=8cm

circumference of first circle=2π×15=30π

circumference of sec. circle=2π×8=16π

circumference of larger cirvle=30π+16π=46π

So,2πR=46π

R=23cm