Final answer:
To cover the tops of all the shelves of the shelving unit, the student will need 8400 cm² of shelf liner, calculated by multiplying the area of one shelf (1400 cm²) by the number of shelves (6).
Step-by-step explanation:
The question is asking how much shelf liner would be needed to cover the tops of all the shelves in a shelving unit with 6 shelves, each of which is 50 cm by 28 cm. To find the total area of shelf liner needed, you would multiply the area of one shelf by the number of shelves.
First, calculate the area of one shelf:
- Area = Length × Width
- Area = 50 cm × 28 cm
- Area = 1400 cm²
Then multiply by the number of shelves:
- Total area = Area of one shelf × Number of shelves
- Total area = 1400 cm² × 6
- Total area = 8400 cm²
Therefore, the student will need 8400 cm² of shelf liner to cover all six shelves.