Question

A block of wood floats in water with `(4//5)th` of its volume submerged. If the same block just floats in a liquid, the density of liquid in `(kg m^(-3))` is
A. 1250
B. 600
C. 400
D. 800

Answer 1

Correct Answer - D
Submerge part = Replaced water
`4/5hrho_(w)=hxxrho_(w)hxxrho_(lamda)`
`therefore" "rho_(lambda)=4/5xxrho_(w)=4/5xx1000`
`rho_(w)=800 kgm^(-3)`