The cost of painting 4walls of room 4m high is rs15 per meter square is rs2400.if breadth of room is two third of its length what will be the cost of carpeting the floor at rs 200 per meter square?

The cost of carpeting the room is Rs 19,200

Step-by-step explanation:

Given as :

The height of the four wall = h = 4 meters

The cost of painting the wall at the rate of rs 15 per square meter = rs 2400

The length of room = L

The breadth of room = b = of length

i.e b =  

Let The cost of carpeting the room =rs x

Now, According to question

∵Area of 4 wall = 2 × (Length + breadth)× height

i.e Area = 2 × (L + b)× h

Or, Area = 2 × (L +   )× 4

Or, Area =

Now,

The cost of painting the wall at the rate of rs 15 per square meter = rs 2400

∴ The cost of painting the 4 wall =

i.e = 160

Or, L =

So,  length = L = 12 meters

The breadth = b =  

i.e breadth =  

Or, breadth = 8 meters

Again

Area of rectangular room = length × breadh

i.e Area of rectangular room = 12 meters × 8 meters

Or, Area of rectangular room = 96 meters²

Now,

The cost of carpeting the room at rs 200 per meters² = area of room × rate of carpeting

i.e  x = 96 meters² × 200 per meters²

Or, x = rs 19,200

So, The cost of carpeting the room = x = rs 19,200

Hence, The cost of carpeting the room is Rs 19,200 Answer

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

really really sorry if i'm

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