Question

If a block of iron (density $5gm/c{m}^3$) of size $5cm\times 5cm\times 5cm$ was weighed while completely submerged in water, what would be the apparent weight? (density of water $=1gm/c{m}^3$)

• A. $5\times 5\times 5\times 5gm-wt$
• B. $4\times 4\times 4\times 5gm-wt$
• C. $3\times 5\times 5\times 5gm-wt$
• D. $4\times 5\times 5\times 5gm-wt$

Answer 1

Answer: (D)

$4\times 5\times 5\times 5gm-wt$

Apparent weight $=({\rho }_1-{\rho }_2)v$
$=(5-1)\times 5\times 5\times 5$
$=4\times 5\times 5\times 5gm.wt.$