Question

The circumference exceeds it's diameter by 16•8 find radius

Answer 1

let the diameter be d
the circumference=d+16.8
22/7×d=d+16. 8
22d=7d+16.8×7
15d=16.8×7
30r=16.8×7
r=3.92

Answer 2

Hi ,

Diameter = d

Circumference = d + 16.8

π d= d + 16.8

πd - d = 16.8

d ( π - 1 ) = 16.8

d ( 22/7 - 1 ) = 16.8

d ( 22 - 7 ) /7 = 16.8

d × 15/7 = 16.8

2r × 15/7 = 16.8 ( since d = 2r )

r = ( 16.8 × 7 )/ ( 15 × 2 )

r =0. 56 × 7

r = 3.92 units

I hope this helps you.

:)