A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4cm below the interface .The density of oil is 0.6 g cm−3.The mass of block is

# A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4cm below the interface .The density of oil is $0.6\text{\hspace{0.17em}}\text{g}\text{\hspace{0.17em}}{\text{cm}}^{-3}$.The mass of block is

1. A

706 g

2. B

607 g

3. C

760 g

4. D

670 g

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### Solution:

Weight of block = Weight of displaced oil + Weight of displaced water

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