Question

lfA=πr²,solve for r. and find the value of 'r'if A=77 and π=22/7

Answer 1

a is equal to 77 then .
77=22/7×r2
7=2/7×r2
49=2r2
r=7/√2

Answer 2

77=22/7 x r^2
77 x 7/22 = r^2
7x 7 / 2 = r^2
49/2 = r^2
7 upon root 2 is r