A house plot is the form of rectangle of length 20m and width 14m. A 10m deep well of diameter of 7m is dug in a northeast corner of the plot and earth taken out of the well spread evenly over the remaining part of the field Question:4) What is the volume of the earth dug A) 352m3 B) 716m3 C) 358m3 D) 356m3
Answers
Given :- A house plot is the form of rectangle of length 20m and width 14m. A 10m deep well of diameter of 7m is dug in a northeast corner of the plot and earth taken out of the well spread evenly over the remaining part of the field
To Find :- What is the volume of the earth dug A) 352m3 B) 716m3 C) 385m3 D) 356m3
Solution :-
we know that,
- Volume of cylinder = π * (radius)² * height .
- Radius = Diameter / 2 .
so,
→ Radius of well = (7/2) m .
→ Height of well = 10 m .
then,
→ Volume of well = (22/7) * (7/2)² * 10
→ Volume of well = (22/7) * (49/4) * 10
→ Volume of well = 11 * 7 * 5
→ Volume of well = 385 m³ (Ans.)
Hence, the volume of the earth dug is 385 m³ .
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Answer:
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