Question

5. The area of four walls of a room is 90 m. Ir the room is 7 m long and 2 m wide, then find the height of the room.​

Answer 1

Answer:

height of room is 5 cm

Step-by-step explanation:

Four walls of the room means lateral surface area.

We assume the room to be Cuboid as most rooms are in the

form of a Cuboid.

Lateral Surface area of the Room = 90 m^{2}m

2

Length of the Room = 7 meters

Breadth of the Room = 2 meters

Formula to find the Lateral Surface area of a Cuboid = 2h(l + b)

Substituting the values known to us in the Formula used to find the Lateral Surface Area of the Cuboid:

=> 2h(l + b)

=> 2h(7 + 2) = 90

=> 2h(9) = 90

=> 9h = 90 / 2 = 45

=> 9h = 45

=> h = 45 / 9 = 5

=> 5 cm

Therefore, Height of the room is 5 cm.