Question

the area of the four walls in a room is 120m2 the lenght is twice the breath if tje height of the room is 4m find the area of the floor

Answer 1

Area of 4 walls=120m
Height=6m
Breadth=b
Length=l=2b
Area of 4 walls = Perimeter*Height
120=2(l+b)4
120=2(2b+b)4
120/4*2=3b
15/3=b
b=5
Breadth=5m
Length=2b=2*5=10m

Total Surface Area= 2(lb+bh+hl)
= 2(10*5+5*6+6*10)
= 2(50+30+60)
= 2*140
= 280m

Ans.) The area of cuboid floor is 280m.