V = x^3 +x^2 - 4x - 4
Base = ( x+ 1) * ( x + 2)
Height = V / Based = x^3 +x^2 - 4x - 4 / ( ( x+ 1) ( x + 2) )
= x^3 +x^2 - 4x - 4 / x^2 +3x + 2
= x -2
ii) x = 4 thus volume = x^3 +x^2 - 4x - 4 = 4^3 + 4^2 -4*4 - 4 = 64 +16 - 16 -4 = 60
iii) area of inner portion is 2( b*h + l*h + l*b )
l = x+1 b = x+2 h = x -2
x =4
thus l,b,h = 5,6,2
area to paint is 2*(6*2 + 5*2 + 5*6 ) = 2*52 = 104 m^2
thus none of the above
iv) Cost of painting 104 *25 = Rs 2600
v) Volume = 60 m^3 = 60000 L
