Answer
455.1k+ views
Hint: - Volume of earth will be always constant. That’s why the volume of wells will equal the volume of the platform. So when you compare both volumes you can find the height of the platform.
Volume of earth that has been dug out will be equal to the volume of the well.
Volume of well =$\pi {r^2}h$
Where radius is $\frac{{3.5}}{2}m$ and height is $16m$
That is volume of earth = $\pi \times \frac{{3.5}}{2} \times \frac{{3.5}}{2} \times 16$=$153.86{m^3}$
The earth which has been dug out has to be used to make the platform.
So, volume of platform=volume of earth
Platform is in the shape of cuboid so we use
Volume of cuboid ${\text{L}} \times {\text{B}} \times {\text{H}}$
$ \Rightarrow 27.5m \times 7m \times H = 153.86{m^3}$
$ \Rightarrow H = 0.799m$
Hence, height of the platform is $0.799m$
Note: -First you have to find how much volume of earth is taken out and compare that volume with the volume of platform .Volume of platform will be the same as volume of cuboid ,Because platform is in the shape of cuboid.
Volume of earth that has been dug out will be equal to the volume of the well.
Volume of well =$\pi {r^2}h$
Where radius is $\frac{{3.5}}{2}m$ and height is $16m$
That is volume of earth = $\pi \times \frac{{3.5}}{2} \times \frac{{3.5}}{2} \times 16$=$153.86{m^3}$
The earth which has been dug out has to be used to make the platform.
So, volume of platform=volume of earth
Platform is in the shape of cuboid so we use
Volume of cuboid ${\text{L}} \times {\text{B}} \times {\text{H}}$
$ \Rightarrow 27.5m \times 7m \times H = 153.86{m^3}$
$ \Rightarrow H = 0.799m$
Hence, height of the platform is $0.799m$
Note: -First you have to find how much volume of earth is taken out and compare that volume with the volume of platform .Volume of platform will be the same as volume of cuboid ,Because platform is in the shape of cuboid.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Why Are Noble Gases NonReactive class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
At which age domestication of animals started A Neolithic class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)