A monkey ascends a greased pole 20 metres high. He ascends 2 metres in first minute and slips down 1 metre in the alternate minute. In which minute, he reaches the top ?
Select:  A) 21st  B) 22nd  C) 23rd  D) 24th  E) 37th
In 2 minutes, he ascends = 1 metre   âˆ´ 18 metres, he ascends in 36 minutes.   âˆ´ He reaches the top in 37th minute.   Answer 37th
<result>E</result>
A monkey ascends a greased pole 20 metres high. He ascends 2 metres in first minute and slips down 1 metre in the alternate minute. In which minute, he reaches the top ?