Question

find the area of four walls of aroom if it's lenth 12m breath 10m find height​

Answer 1

Answer:

Area =Length*breadth*height

12*10*height

= 120*height

Area=120/4=30

Answer 2

Step-by-step explanation:

As lenght and breadth are given,

we will assume that the room is rectangular.

Therefore, Area of rectangle = l × b

= 12× 10

= 120 sq cm

For finding its height ,

we have to make a diagonal

let the diagonal be 'x'

thus two triangles are formed due to the diagonal.

therefore ,

By pythagoras theorem

(diagonal)^2 = (lenght)^2 + (breadth)^2

=12 ^2 + 10^2

=144 +100

=244

therefore ,diagonal ie height =

$\sqrt{244 = 2 \sqrt{61} }$