A well with inner diameter 8 m is dug 14 m deep. Earth take out of its has been evenly spread all around it to a width of 3 m form an embankment. The height of the embankment will be :
A. $${\text{4}}\frac{{26}}{{33}}{\text{m}}$$
B. $${\text{5}}\frac{{26}}{{33}}{\text{m}}$$
C. $${\text{6}}\frac{{26}}{{33}}{\text{m}}$$
D. $${\text{7}}\frac{{26}}{{33}}{\text{m}}$$
Answer: Option C
Solution(By Examveda Team)
Volume of earth dug out :$$\eqalign{ & = \left( {\frac{{22}}{7} \times 4 \times 4 \times 4} \right){{\text{m}}^3} \cr & = 704\,{{\text{m}}^3} \cr} $$
Area of embankment :
$$\eqalign{ & = \frac{{22}}{7} \times \left( {{7^2} - {4^2}} \right) \cr & = \left( {\frac{{22}}{7} \times 11 \times 3} \right){{\text{m}}^3} \cr & = \frac{{726}}{7}{{\text{m}}^3} \cr} $$
Height of embankment :
$$\eqalign{ & = \left( {\frac{{{\text{Volume}}}}{{{\text{Area}}}}} \right) \cr & = \left( {\frac{{704 \times 7}}{{726}}} \right){\text{m}} \cr & = \frac{{224}}{{33}}{\text{m}} \cr & = {\text{ 6}}\frac{{26}}{{33}}{\text{m}} \cr} $$
Related Questions on Volume and Surface Area
A. 12$$\pi$$ cm3
B. 15$$\pi$$ cm3
C. 16$$\pi$$ cm3
D. 20$$\pi$$ cm3
In a shower, 5 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is:
A. 75 cu. m
B. 750 cu. m
C. 7500 cu. m
D. 75000 cu. m
A. 84 meters
B. 90 meters
C. 168 meters
D. 336 meters
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