Question

The radius of semi circular garden is 21 m.one has walk how many m to walk a garden once

Answer 1

Answer:

The correct answer is $108 \; m$.

Step-by-step explanation:

As the garden is in a semicircular shape, therefore,

Radius of garden $= 21 \; m$

As we know that,  

Circumference of semicircle $= \pi r$

Whereas, $r$ is the radius

Therefore,

Distance to walk all around the ground $\left( d \right)$-

$d = \pi r + 2r$

$d = \frac{22}{7} \times 21 + 2 \times 21$

$d = 66 + 42 = 108$

Hence one has to walk $108 \; m$ to walk all around the garden once.