Question

. 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:

She would take 31 seconds to climb 60 stairs

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Answer 2

Answer:

Now by simple unitary method :-

Time taken to climb 3 stairs = 2 seconds

Time taken to climb One stair = 2/3 seconds

Time taken to climb 60 stairs =2/3 *60 seconds = 40 seconds

And thats your answer .

Step-by-step explanation:

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