Answer:
Therefore she needs 1095 mm²to paint the top and sides.
Step-by-step explanation:
Given that Kissing needs to paint the top and side of rectangular prism has a length = 25 mm ,width= 15 mm and height = 9 mm.
The rectangular prism has 6 face.
The floor of the prism is not painted.
Only sides and top is painted.
The surface area of the sides and top is
= 2(length + breadth)×height+ (length × breadth)
=[2(25+15)×9 +(25×15)] mm²
=1095 mm²
Therefore she needs 1095 mm²to paint the top and sides.
