Question

A monkey tries to ascend the greased pole $14$ m high. He ascends $2$ m in first minute and slips $1$ m in next alternate minute. If he continues to ascend in this fashion, how long does he take to reach the top ?

• A. $22$
• B. $24$
• C. $25$
• D. $26$

Answer 1

Answer: (C)

$25$

Monkey ascends $2$ m in first minute and slips $1$ m in next minute.

It means he ascends $2-1=1$ m in every two minutes.

Take $2$ minutes $=1$ unit of time.

It will take $12$ unit of time to climb $12$ m of the pole.

In next $1$ minute $=12$ unit $+1=24+1=25$ minutes.