Question

3. Reena climbs up 5 stairs every second and then climbs down 2 stairs over the next second. How
many seconds will she take to climb 60 stairs​

Answer 1

Answer:

The time taken to climb 60 stairs is 39 seconds.

Step-by-step explanation:

Number of steps climbed by Reena in every second = 5 stairs

Number of steps climbed down by Reena in next second = 2 stairs

Reena climbs 3 stairs in every 2 seconds

Total number of stairs climbed by Reena = 60 stairs

Total time taken = (60/3) (20)

= 40 seconds

Time take by Reena to climb 60 stairs = 40 - 1

= 39 seconds

Thus the time take to climb 60 stairs is 39 seconds.