A certain hall contains two cuckoo clocks.
A certain hall contains two cuckoo clocks. If the first clock chirps 20 times per hour and the second clock chirps 10 times per hour, and both clocks chirp for the first time at 2:03 PM, at what time will the first clock have chirped three times as many times as the second clock can chirp per hour?
Answer/Solution
3:30 PM
Steps/Work
The question is asking when the first clock will have chirped 30 times (3*10 chirps).
The first clock chirps once every 3 minutes.
If the first chirp is at 2:03, then the 30th chirp is at 90 minutes after 2:00.
The answer is E.
The first clock chirps once every 3 minutes.
If the first chirp is at 2:03, then the 30th chirp is at 90 minutes after 2:00.
The answer is E.