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A person of mass 50 kg carrying a box wa...

A person of mass 50 kg carrying a box walks up a staircase. The height and width of each step is 20 cm and 15 cm. If the work done in walking up 50 steps is 7840j, the mass of the box is,

A

20kg

B

30kg

C

40kg

D

50kg

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-WORK, POWER & ENERGY -PRACTICE EXERCISE (WORK)
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  11. A uniform rod of mass 2kg. And length 1m is lying on a horizontal surf...

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