Final answer:
A total of 30 cubical packets each measuring 1 cm can be placed on the floor of the base. When stacking 10 layers, 300 packets can be placed.
Step-by-step explanation:
The student has asked how many cubical packets, each of 1 cm, can be placed on the floor of the rectangular box's base, which is 5 cm long and 6 cm wide. To find the number of packets that can fit in one layer, you would multiply the length by the width of the box base:
Number of packets in one layer = Length × Width
= 5 cm × 6 cm
= 30 packets.
If 10 layers of these packets are stacked on the floor of the box, the total number of packets will be 10 times the number in one layer:
Total number of packets = Number of packets in one layer × Number of layers
= 30 packets × 10
= 300 packets.
Therefore, the correct answer is that 300 packets can be placed if 10 layers are stacked.