Answer: Space was alloted for each subject is 8 dm, 8 dm, 12 dm.
Step-by-step explanation:
Since we have given the length of bulletin board =28 dm
Let the share of three subject areas be 2x,2x,3x
According to question,

so x=4 dm
Now,
Space was alloted for each subject is given as below:
First subject =

Second subject =

Third subject =
