Question

A circular ground whose diameter is $140$ meters is to be fenced by wire three times around its circumference. Find the length of wire needed.
$[$use $\pi =\frac{22}{7}$$]$

• A. $440m$
• B. $1320m$
• C. $660m$
• D. None of these

Answer 1

The correct option is B $1320m$

Diameter of circular ground $=140m$.
Radius of circular ground $=70m$.
Circumference of circular ground $=2\pi r$
$=2\times \frac{22}{7}\times 70$
$=440m$
Length of wire needed to fenced three times
$=440\times 3$
$=1320m$