An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process ? (Take g = 10 $m/s^2$)

An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process ?
(Take g = 10 $m/s^2$)
1). 400 J
2). 50 J
3). 40 J
4). 100 J

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