17. A well with 10 m inside diameter is dug 14 m deep. Earth taken out of it and spread all around
to a width of 5 m to form an embankment. Find the height of the embankment.
cubic metres of earth must be duo out to sink a well 22.5 m deen and diameter 7
Uw mo
Answers
Answer:
4.66 m
Step-by-step explanation:
9th
Maths
Surface Areas and Volumes
Surface Area of Right Circular Cylinders and Cones
A well with  10\ m in...
MATHS
A well with 10 m inside diameter is dug 14 m deep. Earth taken out of it is spread all around to a width of 5 m to form an embakment, the height of the embankment is ________.
December 20, 2019
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Àkársh Rahate
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ANSWER
Well with 10m diameter is dug 14m deep.
⇒ Cylindrical radius =
2
10
=5m
Volume =πr
2
h
=
7
22
×5×5×14
=1100 cubic meter
Is taken out and spread width of 5m.
( diagram )
⇒R
1
=5+5=10m
r=5m
⇒V=π(R
2
−r
2
)h
1100=
7
22
(10
2
−5
2
)h
350=(100−25)h
h=
75
350
=
3
14
⇒h=4.66m
Hence, the answer is 4.66m
Answer:
4.67m
Step-by-step explanation:
diameter of well =10m
radius of well =5m =r
height of wall =14m
radius of well with embankment =10m=R
area of embankment = π(R²-r²)
= π(75)
=75π m²
volume of soil which was in well = volume of embankment
πr²h₁ = 75π * h
25*14 =75*h
4.67m=h
so the height of embankment is 4.67m