Question

If the average person can climb 7 stairs every 10 seconds, taking a 60 second break after each time they have climbed 455 stairs, how long in hours would it take to climb all the stairs in Burj Khalifa?

Answer 1

Answer:

Answer: She will climb 60 stairs on 39 seconds. The net climb for Reena is 3 stairs per 2 seconds. So she should take (60/3) *2=40 seconds.

please mark as brain list

and follow me