SATHEE: Properties Of Solids And Liquids Question 277

Properties Of Solids And Liquids Question 277

Question: Two solids A and Bfloat in water. It is observed that A floats with $\frac{1}{2}$ of its body immersed in water and B floats with $\frac{1}{4}$ of its volume above the water level. The ratio of the density of A to that of B is

Options:

A)4 : 3

B)2 : 3

C)3 : 4

D)1 : 2

Show Answer

Answer:

Correct Answer: B

Solution:

Upthrust = weight of body For A, $\frac{V_{A}}{2} \times ρ_{W} \times g = V_{A} \times ρ_{A} \times g \Rightarrow ρ_{A} = \frac{ρ_{W}}{2}$

For B, $\frac{3}{4} V_{B} \times ρ_{W} \times g = V_{B} \times ρ_{B} \times g \Rightarrow ρ_{B} = \frac{3}{4} ρ_{W}$

(Since 1/4 of volume of B is above the water surface) \ $\frac{ρ_{A}}{ρ_{B}} = \frac{ρ_{W} / 2}{3 / 4 ρ_{W}} = \frac{2}{3}$

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Properties Of Solids And Liquids Question 277

Question: Two solids A and Bfloat in water. It is observed that A floats with 12 of its body immersed in water and B floats with 14 of its volume above the water level. The ratio of the density of A to that of B is

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Question: Two solids A and Bfloat in water. It is observed that A floats with $\frac{1}{2}$ of its body immersed in water and B floats with $\frac{1}{4}$ of its volume above the water level. The ratio of the density of A to that of B is