A) 1 m
B) 1.1 m
C) 1 dm
D) 90 cm
Correct Answer: C
Solution :
Walls are 5 cm thick. \[\therefore \] Internal length \[=(330-2\times 5)\,cm\]\[=320\,cm\] Breadth \[=(260-10)\,cm=250\,cm\] Height \[=(110-x)\,cm\] Here, the cistern is assumed to be open and x is the thickness of bottom. \[\therefore \] \[320\times 250\times (110-x)\]\[=8000\text{ }L\] \[\Rightarrow \] \[320\times 250\times (110-x)\] \[=8000\times 1000\,c{{m}^{3}}\] \[\Rightarrow \] \[(110-x)=\frac{8000000}{320\times 250}\] \[\Rightarrow \] \[110-x=100\] \[\Rightarrow \] \[x=10\,cm=1\,dm\]
You need to login to perform this action.
You will be redirected in
3 sec
