Math, asked by pooja5379, 1 year ago

reena climbs up 5 stairs every second and then climbs down 2 over the next second. How many second will she take to climb 60/stairs?​

Answers

Answered by Rathin5678
0

the answer is 39 seconds.

hope this answer helps you and plz mark it as the Brainliest

Attachments:
Answered by poojan
22

Given data:

Reena climbs up 5 stairs Every second and then climb down 2 stairs over the next second.

To find:

The total time taken by Reena to climb 60 stairs.

Solution:

As for every second she climbs 5 stairs and in the next second she climbs down 2 stairs,

Total stairs she climbs in 2 seconds = 5 - 2 = 3 stairs.

Total number of steps climbed by Reena = 60 stairs  

Therefore, time take by Reena to climb 60 stairs

                                  = (60/3)(2)    [As she takes 2 seconds to climb 3 stairs]

                                  = 40 seconds

But, at 39th second, we know that she climbs 5 stairs making it 62, which means, she'll be out of the complete 60 stairs making it no need to climb down further.

So, Time taken by Reena to climb 60 stairs = 40 – 1 = 39 seconds

Therefore, the total minimum time taken by Reena to climb 60 stairs is 39 seconds.

Learn more:

Three taps A, B and C can fill a tank in 10 minutes, 15 minutes and 20 minutes respectively. If the taps were shut off after 5 minutes, what is the volume of water that overflowed in %?​

brainly.in/question/15608672

Amit climbs up 5 stairs in one second.He then climb down 3 stairs in next one second.How many seconds will he take to climb 62 stairs ?

https://brainly.in/question/21704309

Similar questions