Question

Q27: the diameter of a circle whose radius is r/2 is equal to (b) 2r (a) r (c) r/4 (d) r​

Answer 1

Answer:

(d) r because r/2*2=r

Step-by-step explanation:

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Answer 2

Answer:

∴ The diameter of a circle whose radius is $\frac{r}{2}$ is $r$.

Hence, option (d) $r$ is correct.

Step-by-step explanation:

• In context to question asked,
• We have to find the diameter of a circle whose radius is $\frac{r}{2}$.
• We know that the diameter of the circle is twice the radius.
• The formula for diameter of the circle is given by,  

     Diameter of the circle = $2r$

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

                                     = $r$

• ∴ The diameter of a circle whose radius is $\frac{r}{2}$ is $r$.
• Hence, option (d) $r$ is correct.