Question

A frog starts climbing 15ft wall each hr he climbs 3ft and rest for 30 mins during rest he sleeps back 2 ft.how many hrs does the frog take to reach the top.​

Answer 1

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Answer 2

Time taken by frog to climb 3 ft = 1 hr

Time for rest =30 mins

So when it takes rest it sleeps 2 ft.

So in 1 HR 30 mins it climbs only 1 ft

Time taken to climb 12 ft = 1 HR 30 min X12= 18 hrs

Then it will climb again 3 ft in 1 HR.

Then (18+1) =19 hrs.

So, the frog takes 19 hrs to climb 15ft wall.