**Question 1: **If the diameter of a circle is 7cm find out the radius?

** Solution: **

The given diameter is 7cm.

The radius r is given by,

r=$\frac{d}{2}$

r=$\frac{7}{2}$=3.5cm

**Question 2: **Find the radius of a circle whose diameter is 4cm?

** Solution: **

The diameter of a given circle is 4cm

Radius is given by,

r=$\frac{d}{2}$

r=$\frac{4}{2}$=2cm