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17. The20. An electronic device makes a beep after every 15 minutes. Another device makes a beepafter every 20 minutes. They beeped together at 6 a.m. At what time will they next beepLogether?

Answer»

At 50 minutes time Will they next beep together.

Find the cube root of 1728

they beep together every one hour so answere is 7:am

1st device will beep at 6:15, 6:30, 6:45, 7:00,..... So on

2nf device will beep at 6:20, 6:40, 7:00, 7:20 and so on..

So they beep together at 7 a. m



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