how many cubic metres of the earth must be dug to constuct a 25 metre deep well of diametre 5.6 m if the earth taken out is spread over a rectangular plought sze of 22 m ✕ 16m find the hieght of platform formed
Answers
Step-by-step explanation:
Why should curd and sour substances not be kept in brass or copper vessels? Both the Curd and sour substances are acids. Acids react with metals to produce salt and hydrogen gas. So, if such substances are kept in a copper container, the acid will react and the container will be corroded.
Your Question :
How many cubic metres of earth must be dug to construct a 25-m-deep well of diameter 5.6 m? If the earth taken out is spread over a rectangular plot of size 22m × 16m, find the height of the platform so formed.
Given Information :
- Height of the well = 25 m
- Diameter = 5.6 m
- rectangular plot = 22m × 16m
To Find :
- Height of the platform which will be formed.
Solution :
Here, h = 25m and r = 5.6/2 m = 2.8m
∴ Volume of the earth dug out = volume of the well = πr²h
: ⟼ 22/7 × 2.8 × 2.8 × 25m³
: ⟼ 616 m².
So, 616 m³ of earth must be dug to construct such a well.
Now, Area of the platform = 22 m × 16 m = 352 m²
⟹ volume of the platform = area × height = 352 m² × height.
Also, volume of the platform = volume of the earth dug out ⟹ 352 m² × height = 616 m³
⟹ height = 616/352 m = 1.75 m.
Therefore :
∴ The height of the platform is 1.75 m.
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