A monkey climbs a 12-meters-high slippery pillar. In his first minute, he climbs 2 meters, and in the next minute, he slips one meter down. In this way, how much time will he take to reach the top of the pillar? What is the correct
A. 10 minutes
B. 12 minutes
C. 11 minutes
D. 21 minutes
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সঠিক উত্তরঃ
D.
21 minutes
Explanation:
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