CTET 2 Math and Science Dec 2018 Paper

Let the height of the water level in the tank = ‘h’ cm
∴ Volume of tank = Volume of water
Area of Base × height = 140 ${\mathit{m}}^3$
700 × h = 140 [∵ Volume of prism = Area of base × height]
$\mathit{h}=\frac{140}{700}=\frac{1}{5}\mathit{m}$ $=\frac{100}{5}=20\mathrm{cm}$