Question

A body of mass 70 kg when completely immersed in water displaces 20000 cm3 of water. Find the weight of the body in water .

Answer 1

m= 70kg

weight=m×g=
= 70×10
=700N

Answer 2

$\huge\textbf{Answer :}$

Mass = 70 kg

Weight of water displaced = 2000 cm³

Means; Weight = 2000 cm³

$2×{10}^{-3}$ ${cm}^{3}$

Density of the substance = $\dfrac{70}{2 \times {10}^{-3}}$

= $35\:\times\:{10}^{3}$

Relative Density = 

$\dfrac{Density\:of\:substance}{Density\:of\:water}$

= $\dfrac{35 \times{10}^{3}}{{10}^{3}}$

Relative Density of material of the object is $\textbf{35}$