Answer:
D. 15/12 and 5/4
Step-by-step explanation:
15/5=3
12/4=3
If there are 15 boards there are 14 gaps in-between.
But first, 15 boards each 9 and 1/4th inches so you get a total of 138 inches and 3/4th
If you subtract that from 144 you get 5 inches and 1/4th. The remaining amount is the total of all of the distance from the spacing.
Then you divide that by 14 (number of gaps/spacing in-between.)
So you get .375 inches. (3/8)
So width of the spacing between each board is 3/8ths of a inch
4/10, 6/15, 8/40 are all equivalent to 2/5
Answer:
12 3/5
Step-by-step explanation: