Question

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

Plz help me

Answer 1

2(l+b)h=90

2(7+2)h=90

18h=90

h=5

Hence,the height of the room is 5m

Answer 2

Given Four walls of the room is =90m²

The room is 7m long

The room is 2m Wide

= 2h (l+b)

90m² = 2h (9m)

h = 2×9/90

= 5cm

Step-by-step explanation:

First Understand the question

Let the height = x

and then we added the length and breadth together (l+b) 2+7=9

We got 9

Then we multiple 2×9 and 90 as denominator

90 is disvible to 9 So it became 10 and 10 is disvible to 2 so it became 5

.:. Hence we got the answer.