Question

Hope an expert can.help with this. thanx

Answer 1

Taking care of units first:

4000cm = 40m

700cm = 7m

Let's find the area then:

A1 = Area of Small Rectangle =
`length*width`

A2 = Area of Large Rectangle =
`length*width`

A3 = Area of Semi-Circle =
`(\pi r^(2))/(2)`

`A=A1+A2+A3\\A=(lw) + (lw) + ((\pi r^(2))/(2))\\A=[(10)(40)]+[(68)(33)]+[(\pi r^(17))/(2)]\\A=(400)+(2244)+(8.5\pi)\\A=8.5\pi +2644\\A=(26.7)+2644\\A=26.7+2644\\A=2670.7m^(2)`

Then, to find the perimeter:

`P=40+68+33+34+7+10+((2\pi r)/(2))\\P=192+(\pi r)\\P=192+(17\pi)\\P=192+53.4\\P=245.4m`

In summary:

`P=245.4m\\A=2670.7m^(2)`