Question

III. Evaluation:
A classroom is of length 7m, breadth the 6m and height 3m. Find the surface area of the
four walls (Including the area of door and windows).​

Answer 1

=Length X breadth x height

=7x6x3

=126cm

Answer 2

Given ,

Length ( l ) of a classroom = 7m

Breadth ( b ) of the classroom = 6m

Height ( h ) of the classroom = 3m

Used Formulae :-

Area of four wall i.e 2 × h × ( l + b ) .

Now , Area of four wall of the given classroom will be as follows :-

2 × 3 × ( 7 + 6 )

6 × ( 13 )

78 m² .

Therefore , Area of four wall of the given classroom is 78m².