What is the weight of water contained in a conical vessel 21 cm deep and 16 cm in diameter ?

Answer: Option B

Volume of water :
$$\begin{array}{rl}& =\left(\frac{1}{3}\times \frac{22}{7}\times 8\times 8\times 21\right)\text{ c}{\text{m}}^3\\ & =1408\text{ c}{\text{m}}^3\\ & =\left(\frac{1408}{1000}\right)kg\\ & =1.408kg\end{array}$$