3 pressure cookers whistle after every 4,6 and 8 seconds respectively. They all whistled together at 8:00 a.m for the first time . At what time will they whistle together for the 7th time?
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Step-by-step explanation:
Take lcm of 4,6,8
Which is 24
That means three pressure cookers whistle together after 24 seconds
They are asking at what time will they whistle together for the 7th time
At 8:00am all whistled together that means from after 6 times of 24 seconds all the cookers will whistle together for 7th time
Multiply 24 by 6
24*6=144seconds
After 144 seconds all three pressure cookers will whistle together 7th time
Convert 144 seconds to minutes by dividing it by 60
144/60=2.4minutes =2 minutes 24 seconds
Now 8:00am +2minutes 24 sec will be
8:02:24 am
The time at which all cookers whistle together for 7th time
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