A frog is at the bottom of the well which is 20 meters deep. Everyday the frog jumps 5 meters upwards and fall 4 meters down.On which day the frog will reach the top?
+36916 Is reaching to top considerd to be when the frog falls back 4 meters and his height is 20 m from the bottom?
if so, then each day he gains 1 meter in height ..... it will take 20 days. Not that for several days the frog's 5 meter jump will raise it higher than the lip of the well....but the frog falls back down.....
+2862 going off your answer, if the frog DID reach the top the moment it goes over the well top, regardless how much it falls:
the well is 20m deep, the frog jumps 5m. So the frog needs to reach 20 - 5 = 15m.
jumps 5m and falls 4m, so it jumps 5 - 4 = 1m
15m/1m=15
the frog reaches the top on the 15th day
