Question

the area of four walls of a room is 57.4sqcm If the room is 5cm long and 3.2 m wide, find the height of the room

Answer 1

2h(b+l)=57.4
2h (3.2 +5)=57.4
2h (8.2)=57.4
2h=57.4÷8.2
2h=7
h=7÷2=3.5