Question

The circumference of a circle is 16.8cm more than its diameter than the radius of the circle in cm

Answer 1

Here is your answer
The Circumference of circle is 2πr
Diameter is 2r

ATQ
$2 \times \frac{22}{7} \times r = 2r + 16.8 \\ 6.28r - 2r = 16.8 \\4.28r = 16.8 \\ r = \frac{16.8}{4.28} \\ r = 3.92$
So Radius of circle is 3.92cm

Hope it helps you