Question

the length of a room is 3 times its height and breadth is one whole one upon two times its height.

Answer 1

Answer:

Let h be the height of the room

so length =3h

Breadth =

2

3

h

Area of walls =2(lh+bh)

Area of walls =

Rate

cost

=

1.50

216

=144m

2

So 2h(3h+

2

3

h)=144

⇒2h(

2

9h

)=144

⇒h

2

=

9

144

⇒h=

3

12

=4m

l=12 m, b=6 m, h=4 m.