Question

a room is 6 metre long 4.5 metre broad and 3 metre height find the cost of whitewashing its four was at the rate of rupees 12 per metre square also find the cost of laying the stone slab on the floor at rupees 48 per metre square​

Answer 1

Given :-

A room is 6m long

A room is 4.5 m broad

The height of room is 3 meter

The rate of white washing = 12 per metre

The cost of laying stone slab on the floor

is 48 per meter square .

Solution :-

Area of four walls

$2( \: l \: + \: b \: ) \: h \:$

Put the required values ,

Area of four walls = 2 ( 6 + 4.5 ) * 3

Area of four walls = 63m.sq

Now ,

The cost of white washing is Rs 12 per m.sq

Therefore ,

The cost of white washing of 4 walls = 63 * 12

The cost of white washing of 4 walls = Rs756

Now ,

The Area of floor = 6 * 4.5

The Area of the floor = 27 m.sq

The cost of laying the stone slab is 48 per m.sq

Therefore ,

The cost of laying of the laying the stone slab

= 48 * 27

= Rs 1296

Answer 2

Step-by-step explanation:

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GIVEN IN QUESTION =

A room is 6m long

A Room is 4.5 m broad

The height of room is 3 meter

The rate of white washing=12 rupee per meter

The cost of laying stone slab on the floor is =48per meter square

solution!!!!

area of 4 walls =2(l+b)h

1st we will put the required value

AREA OF 4 WALLS=2(6+4.5)*3

Area of 4 walls=63meter square

NOW

The cost of white washing is= rupee 12 per meter square.....

therefore ...

THE COST OF WHITE WASHING OF 4 WALLS= 63*12= RUPEES $756

now we come to now that area of floor is =

6*4.5

NOW the area will be =27 meter square .

THE COST OF LAYING THE STONE SLAB

is =48 METER SQUARE

therefore we come to know that

The total cost of laying The stone slab will =

48*27=Rs1296

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correct answer of this question is

rupee=1296