A man starts climbing a hill every minute he ascended 20 yards but slips down 5 yards how long will he take to ascend a point 80 yards hight?
- 5 minutes
- 6 minutes
- 7 minutes
- 8 minutes
Explanation
Man climbs 20 yards and slips down 5 yards in one minute
i.e. he climbs (20-5 = 15 yards) in one minute.
But in the last minute, he will be climbing 20 yards as he gets on the top so no slip.
Time taken to climb 80 yards = 60/15 + 1
= 5 minutes.
He climbs the hill in 5 minutes
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