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Program to find the volume and surface area of a cuboid

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C      Program to find the volume and surface area  of a cuboid
        write(*,*)'Enter the length:'
        read(*,*)r
        write(*,*)'Enter the width:'
        read(*,*)w
        write(*,*)'Enter the height:'
        read(*,*)h
        a=2.0*(w*r+r*h+h*w)
        v=w*r*h
        d=sqrt(w**2+r**2+h**2)
        write(*,10)a
        write(*,20)v
        write(*,30)d
 10   format(2x,'The area of the cuboid is',f16.4)
 20   format(2x,'The volume of the cuboid is',f16.4)
 30   format(2x,'The space diagonal of the cuboid is',f16.4)
        end
        
        
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