A) 15 cm
B) 20 cm
C) 25 cm
D) 30 cm
Correct Answer: C
Solution :
Area of tank, BCDE\[=10\times 7.5=75\,\,{{\text{m}}^{2}}\] Area of remaining field ABEDFGA \[=125\times 15-75\] =1800 sq m Volume of Earth dug \[=10\times 7.5\times 6=450\,\,\text{cu}\,\,\text{m}\] By given condition, \[1800\times h=450\] \[\Rightarrow \] \[h=\frac{1}{4}\,\,\text{m}=\frac{1}{4}\times 100\,\,\text{cm}=25\,\,\text{cm}\]You need to login to perform this action.
You will be redirected in
3 sec