1.

A block of steel of size `5 cm xx 5cm xx 5cm` is weighed in water. If the relative density of steel is 7. its apparent weight is:A. `6 xx 5 xx 5 xx 5 gf`B. `4 xx 4 xx 4 xx 7 gf`C. `5 xx 5 xx 5 xx 7 gf`D. `4 xx4xx 4 xx 6 gf`

Answer» Correct Answer - A
`W_("app")=mg-F_(B)`
`W_("app") = rho Vg - rho_(w)Vg`
`=(rho-rho_(w))Vg`
`=(7 rho_(w) - rho_(w)) Vg = 6 rho_(w) Vg`


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