Question

plz answer these questions

Answer 1

We know that,

Area of circle = pi r^2

=> pi × r^2 = pi x^2 + 10 pi x + 25 pi

=> pi × r^2 = pi ( x^2 + 10x + 25)

=> r^2 = x^2 + 10x + 25

=> r^2 = x^2 + 5x + 5x + 25

=> r^2 = x ( x+5) +5 (x+5)

=> r^2 = (x+5)(x+5)

=> r = x + 5

Radius of circle = x + 5

Answer 2

Hi,

Please see the attached file!


Thanks