Question

find the total area of four walls of a room dimension7 m long 5m wide and 3m high​

Answer 1

Answer:

Hey mate here is your answer

Total surface area=2h(lb+bh+hl)

=2×3(7×5+5×3+3×7)

=6(35+15+21)

=6×71

=426m^2

Hope it helps you

Answer 2

Answer:

area of 4 walls = lateral surface area = 2(lb +bh)

= 2 ( 7×5+5×3)

= 2( 35+15)

= 2( 50 )

= 100 m square