Answer:
Option (B)
Step-by-step explanation:
Let the width of a rectangle= w
As per given information, length of a room is 7 less than three times the width of a room
3 times of a width of a room= 3 w
Hence Length of a room= 3 w- 7
We get the length of a room = 3 w- 7
And area= L ×B = w ( 3 w - 7)
Hence, Option (B) is correct answer
