Question

four walls of a room is 77 metre square the length and breadth of the room 11.5 and 3.5 find the height of the room

Answer 1

Answer:

We have,

Lateral Surface Area of the room (LSA) = 77 meter square.

length = 11.5 m

Breadth = 3.5 m

To find: height of the room

Sol.

since, LSA= 2h(b+l)

therefore, 77 = 2×h(11.5+3.5)

or 77=2h(15)

or 77÷30 = h

or height of the room = 2.3 m

Answer 2

The height will be "2.56 m".

Step-by-step explanation:

$The \ given \ values \ are:\\The \ lateral \ surface \ area \ of \ a \ room=77 \ m^2\\The \ length,l=11.5 \ m\\The \ breadth,b=3.5 \ m\\The \ height=?\\As \ we \ know,\\The \ lateral \ surface \ area=2h(b+l)\\On \ putting \ the \ values \ in \ the \ above \ formula,we \ get\\77=2h(11.5+3.5)\\77=2h(15)\\77=30h\\h=\frac{77}{30}\\h=2.56 \ m$

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