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Q.

A raft of wood of mass 120 kg floats in water. The weight that can be put on the raft to make it just sink is ( $10 x$ )kg. Find value of $x$ . Given density of raft = $600 k g / m 3 .$

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Detailed Solution

$(m_{raft} + m) g = V_{raft} ρ_{w} g$

$∴ m = V_{raft} ρ_{w} - m_{raft}$

$= \frac{120}{600} \times 1000 - 120 = 80 kg$

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