Rehaan climbs 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 the question please
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Answer:
20 seconds
Step-by-step explanation:
it means she will take 3stairs for 2sec
then now find 60stairs for how many seconds
divide 60by3
60÷3=20
20 second will require to climb 60 stairs
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Stairs climbed down by reena in next second =2 stairs
For every 2 sec. the no. of stairs climbed by reena= 5-2 = 3 stairs
Total no. of stairs climbed by reena = 60 stairs
2 sec ………… 3 stairs
? ………… 60 stairs
Therefore, time taken by reena to climb 60 stairs = (60*2)/3 = 40 sec.