Question

A girl of mass 40 kg takes a staircase of 15 steps, each of height 20 cm. If she utilizes a power of 80 W to climb the staircase, the time taken by her is [Take g = 10 m/s2] (1) Half a minute (2) 40 s (3) 45 s (4) 15 s

Answer 1

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here is your answer