A person of mass $50 k g$ carrying a load of $20 k g$ walks up to a staircase. If the width and height of each step are $0.25 m$ and $0.2 m$ respectively, the work done by the man in walking up $20$ steps is, (g= $10 m s^{- 2}$ )

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A 50kg man with 20kg load on his head climbs up 20 steps of 0.25m height each. The minimum work done by the man on the block during climbing is

The correct option is C 1000 JMass of block(m)=20kgHeight (h)=20×0.25=5mWork doneW=mgh =20×10×5 W=1000J

A $50 k g$ man with $20 k g$ load on his head climbs up $20$ steps of $0.25 m$ height each. The minimum work done by the man on the block during climbing is

The correct option is C $1000 J$
Mass of block(m) $= 20 k g$
Height (h) $= 20 \times 0.25 = 5 m$
Work done $W = m g h$
$= 20 \times 10 \times 5$
$W = 1000 J$