Math, asked by ry8639603, 18 days ago

length and breadth of class room are twice and 3/2 times the height respectively. The cost of white washing at Rs 40 per m^2 is Rs 440. find the cost of tiling at Rs 80 per sq. meter.​

Answers

Answered by MissQueenOfFashion
4

Step-by-step explanation:

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Answered by BrainlySrijanll
1

Given:

Let the height of class room be =h

Then length of class room (l)= 2h

And Breadth of class room (b) = (3/2)h

Rate for painting walls = Rs. 1.60/m²

Cost of painting walls = Rs. 179.20

Rate of tiling the floor = Rs. 6.75/m²

To find:

We have to find the cost of tiling the floor

Solution:

To knoe the cisy of tiling we need get the area of the floor= l×b

Here l and b values are in terms of h

So first we need to find the value of h by following way

Cost of painting walls = Rate of painting walls×Area of 4 walls

179.20= Rate of painting walls×[21h+ 2bh ]

= (1.60) × [2(2h)(h)+2(3/2h)(h) ]

179.20= (1.60) ×[4h²+3h²]

7h²= 179.20/1.60

7h²=112

h²=112/7

h =4^7/7

h = 4

Now h = 4m

l=2h=2(4)=8m

b=3/2h=3/3(4)=6m

Now cost of tiling the floor = Rate of tiling×(Area of floor)

= 6.75 × (lb)

= 6.75 × (8 × 6)

= 6.75 × (48)

= 324

∴Cost of tiling the floor = Rs. 324

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