Semicircles are drawn outside by taking every side of regular hexagon as a diameter. The ;perimeter of hexagon is 60 cm. Find the area of complete figure formed as such.($\pi$ = 3.14) ($\sqrt3$ = 1.73)

The area of the closed figure bounded by $x=-1, \, x=2$ and $y= -x^2+2, \, x\leq 1$ and $y= 2x-1 ,\, x>1$ and the abscissa axis is ;

The area bounded by the line $y=x$, x-axis and ordinates $x=-1$ and $x=2$ is?

Area of the region bounded by $y=x-[x],\ y=[x]$ and $\mathrm{x}$-axis in $[$0,2 $]$ is: