Question

A block of steel of size $5cm\times 5cm\times 5cm$ is weight in water. If the relative density of steel is 7.Its apparent weight is:

• A. $6\times 5\times 5\times 5gf$
• B. $6\times 4\times 4\times 4gf$
• C. $7\times 5\times 5\times 5gf$
• D. $5\times 5\times 5\times 5gf$

Answer 1

The correct option is A $6\times 5\times 5\times 5gf$

Real wt. of steel = $7g/cc\times 125cc$

= 875 gm

So, R.D = $\frac{875}{875-AW}$

875 - AW = $\frac{875}{7}$

$AW=750$

Apparent weight = 750 gm

= $6\times 5\times 5\times 5gf.$