A square wooden raft of side is made from timber of density

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

A square wooden raft of side

2\,\text{m}

is made from timber of density

600\,\text{kg m}^{-3}

. What minimum thickness should the raft have so that it can just keep afloat a boy of mass

60\,\text{kg}

in still water? Take density of water

=1000\,\text{kg m}^{-3}

. (a)

0.030\,\text{m}

(b)

0.038\,\text{m}

(c)

0.045\,\text{m}

(d)

0.015\,\text{m}