Question

A girl of mass 40 kg takes a staircase of 20 steps each of height 15 cm. If she utilizes a power of 80 W to climb the staircase , the time taken by her is (g=10 m/s)

1. half a minute

2. 1 mins.

3. 45 sec.

4. 15 sec.​

Answer 1

Answer:

3)

Explanation:

this may help you friend