60 meters of fencing is used completely to form an enclosed semi-circular region. what is the area of the semi-circular region? '

Step-by-step explanation:

Given:

Perimeter of the semi-circle = 60 m

let the radius of the semi-circle to be 'r'

Also,

Perimeter of the semi-circle = πr + 2r = ( π + 2 ) × r

on equating, we get

( π + 2 ) × r = 60 m

or

r =

now,

the area of the semi circle = πr² / 2

on substituting the value, we get

area =

or

area =

Hence,

the area of the semi-circular region =  

for this case we have that by definition, the volume of a cylinder is given by:

where:

r: it's the radio

h: it's the height

we have as data that:

substituting:

so, the cylinder volume is

option d