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
Step-by-step explanation:
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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