A frog is climbing a well 21 meters deep. It climbs 5 meters in one hour but then slides back 1 meter as it rest for an hour. how long will it take to climb out of the well?
Answers
Step-by-step explanation:
The progress of frog can be tabulated below :
After 1st hour : 5 m
After 2nd hour : 4m after rest
After 3rd hour = 9m
After 4th hour = 8m after rest
After 5th hour = 13m
After 6th hour = 12m after rest
After 7th hour = 17m
After 8th hour = 16m after rest
After 9th hour = 21m
Bingo!!!!
It will be out after 9 hours !!!!
Alternate method :
Assume the frog will climb the last 5m in the final leg.
=> It has to climb 16m following “climb & slide” pattern.
It will climb 4m in 2 hours.
=> It takes 4 x 2 = 8 hours to climb 16m
Last 5m climb in 1 hour.
=> Total time = 8 + 1 = 9 hours.
Answer:
frog is climbing a well 21 meters deep. It climbs 5 meters in one hour but then slides back 1 meter as it rest for an hour. how long will it take to climb out of the well?