Step-by-step explanation:
A box has the shape of a rectangular prism with height 33 cm.
height, h = 33 cm and length be l
Area of the prism,A1= 33l ... (1)
Height is increased by 0.2 cm
h becomes 33.2 cm
Now area of the prism,A2 = 33.2l =(33 + 0.2)l
A2 = A1 + 0.2l .. (2)
SUbtracting eq(1) and (2)
A2 - A1 = A1 + 0.2l - A1
= 0.2l
The surface area of the box increases by 0.2l
