Question

Rehaan climbs 5 stairs every second and then climbs down 2 stairs over the next second. How many seconds will she take to climb60 stairs​

Answer 1

Answer:

The net climb for Reena is 3 stairs per 2 seconds. So she should take (60/3) *2=40 seconds. Since in the last second she will not fall, she will reach a second before, that is by 39th second.

Step-by-step explanation:

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Answer 2

Answer:

5*60=300

2*60=120

300-120=180

3 steps every 1 sec

60/3 = 20

here is your answer 20 seconds

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