Question

If the difference between the circumference and the radius of a circle is 37 cm, then using $\pi =\frac{22}{7},$ the circumference (in cm) of the circle is :

• A. 154
• B. 44
• C. 14
• D. 7

Answer 1

The correct option is B 44

$Circumfurence=2\times \pi \times RC-R=37(2\times \pi \times R)-R=37R\left(\right(2\times \pi )-1)=37R(\frac{44}{7}-1)=37R\left(\frac{37}{7}\right)=37R=37\times \frac{7}{37}R=7$
So, Circumfurence $=2\times \frac{22}{7}\times 7$
$=44cm$