Question

Length:40m
Breadth:28m
The length of the floor of a room is two times its breadth and the perimeter of the floor is 48m. find the cost of paving Marbles on the floor at rupees 125 per square metre.​

Answer 1

Answer:

16,000 Rs

Step-by-step explanation:

let the breadth of the room = x

So, length = 2x

Perimeter of room = 2(l+b)

48m = 2(x+2x)

48 = 2x+4x

48 = 6x

x = 48/6

x = 8

Breadth = x

= 8

Length = 2x

= 16

Now,

Are of floor = lxb

= 8x16

= 128 m sq.

Cost of paving marbles on the floor = 125 per m sq.

So, 128 x 125 = 16,000 rs

Answer 2

let the breadth of the room = x

So, length = 2x

Perimeter of room = 2(l+b)

48m = 2(x+2x)

48 = 2x+4x

48 = 6x

x = 48/6

x = 8

Breadth = x

= 8

Length = 2x

= 16

Now,

Are of floor = lxb

= 8x16

= 128 m sq.

Cost of paving marbles on the floor = 125 per m sq.

So, 128 x 125 = 16,000 rs