The traffic light at 3 crossing change at interval of 30 seconds, 45 second and 60 second . Is they all change together at 7:00 a.m. at what time will they change together again
I was doing 11 question in end of the chapter excercise of chapter orienting yourself: the use of coordinate geometry. The solution given in this app is slightly confusing when you find p. Can anyone give an simpler solution?