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

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Question

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

Options:

A . 1.256 kg

B . 1.408 kg

C . 2.480 kg

D . 3.875 kg

Answer: Option B
Volume of water :
$$\eqalign{
& = \left( {\frac{1}{3} \times \frac{{22}}{7} \times 8 \times 8 \times 21} \right){\text{ c}}{{\text{m}}^3} \cr
& = 1408{\text{ c}}{{\text{m}}^3} \cr
& = \left( {\frac{{1408}}{{1000}}} \right)kg \cr
& = 1.408\,kg \cr} $$

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