Question

Me. James has a 6-square-foot bulletin board and a 12-square-foot bulletin board. She wants to cover both boards with index cards without gaps or overlaps. Each index card has an area of 1/4 square foot. How many index cards does she need?

Answer 1

Answer: There are 72 index cards she needed.

Explanation:

Since we have given that

Area of first bulletin board = 6 square foot

Area of second bulletin board = 12 square foot

Area of each index card is given by

`(1)/(4)\ sq.\ foot`

So, Number of index cards needs for first bulletin board is given by

`(6)/((1)/(4))\\\\=6* 4\\\\=24`

Number of index cards needed for second bulletin board is given by

`(12)/((1)/(4))\\\\=12* 4\\\\=48`

Hence, Number of index cards she needed is given by

`48+24\\\\=72`

Therefore, there are 72 index cards she needed.