A monkey ascends a greased pole 18 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 ?  Choose the correct choice from the following options:
A) 21st	B) 22nd	C) 33rd	D) 24th	E) None of these
In 2 minutes, he ascends = 1 metre   âˆ´ 16 metres, he ascends in 32 minutes.   âˆ´ He reaches the top in 33rd minute.   Answer 33rd
<result>C</result>
A monkey ascends a greased pole 18 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 ?