Given : The Total Area of 3 Classrooms is 725 sq.ft
Given : The Area of Classroom-1 is 220 sq.ft
Given : The Area of Classroom-2 is 330 sq.ft
Total Area of 3 Classrooms will be : Sum of the given Three Classrooms (i.e) Classroom-1 , Classroom-2 and Classroom-3
⇒ Total Area of 3 Classrooms = Area-1 + Area-2 + Area-3
⇒ 725 = 220 + 330 + Area of Classroom-3
⇒ Area of Classroom-3 + 550 = 725
⇒ Area of Classroom-3 = 725 - 550
⇒ Area of Classroom-3 = 175 sq.ft
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