There is well of depth 30 m and frog is at bottom of the well. He jumps 3 m in…
2024
There is well of depth 30 m and frog is at bottom of the well. He jumps 3 m in one day and falls back 2 m in the same day. How many days will it take for the frog to come out of the well?
Answer: A. 28 days — Answer: 28 days Explanation: Each full day the frog gains a net of 1 m: it jumps 3 m during the day and slips 2 m at night (3 - 2 = 1). After 27 full days the…
- A.
28 days
- B.
31 days
- C.
20 days
- D.
26 days
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Correct answer: A
Answer: 28 days
Explanation:
Each full day the frog gains a net of 1 m: it jumps 3 m during the day and slips 2 m at night (3 - 2 = 1).
After 27 full days the frog has gained 27 m and is at a height of 27 m.
On the 28th day the frog jumps 3 m from 27 m to reach 30 m and escapes the well before slipping back.
Therefore, the frog comes out of the well on the 28th day.