1.

A monkey climbs up a greased pole, ascends 20m and slip 4m in alternate minutes. If the pole is 96m high, how many minutes will it take to reach the top?

Answer»

54/5



net height climbed in 2 min = 20m - 4m = 16m
In 10 min the net height climbed = 16 * 10/2 = 80m
Remaining height = 96M - 80m = 16m
In the 11th min , the monkey will be ascending up. 
Time taken to ASCEND the last 16MIN
16/20 = 4/5min
Total time taken = 10 + 4/5 = 54/5 min



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