Consider the length =x, breadth =2x and height =3x ∴ Volume of the cuboid = length × breadth × height ‌‌=x×2x×3x=6x3 According to the question, New, length =2x, breadth =4x and height =6x ∴ New volume =2x×4x×6x=48x3 ∴ Increase in volume =‌