A monkey ascends a greased pole 12 meters high. He ascends 2 meters in the first minute and slips down 1 meter in the next minute and so on .
A monkey ascends a greased pole 12 meters high. He ascends 2 meters in the first minute and slips down 1 meter in the next minute and so on . In which minute does it he reaches the top?
(a) 21st (b) 22nd (c) 23rd (d) 24th (e) None of these
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(a) In 2 minutes, he ascends = 1 metre
10 metres, he ascends in 20 minutes.
He reaches the top in 21st minute.
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