A monkey climbs a 12 meters-high slippery pillar. In his first minute, he climbs 2 meters, and in the next minute, he slip one meter down. In this way, how much time will he take to reach the top of the pillar?
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
3 (21 minutes)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Solution:
On first minute monkey climb = 2 m
On the second minute it slips = 1 m
For every two minute, it climbs 1 m
So, average speed = 1 m/2 min For 10 m,
time is taken = 20 min
For the last 2 m jump add 1 min
So time taken = 20 + 1 = 21 min
∴ Monkey takes 21 minutes to reach the top of the pole.
