six bells commence tolling together at 7:59 am. They toll at intervals of 3,6,9,12 and 15 seconds respectively. How many time will they toll together till 8:16 am? (excluding the toll at 7:59 am)
छह घंटियां सुबह 7:59 बजे एक साथ बजने लगती हैं। वे क्रमशः 3,6,9,12 और 15 सेकंड के अंतराल पर बजती हैं। वे सुबह 8:16 बजे तक एक साथ कितनी बार बजेंगी? (सुबह 7:59 बजे बजने को छोड़कर)
Correct Answer:
Seconds between 7:59am and 8:16am = 1760=1020
L.C.M. of 3,6,9,12 and 15 = 180
They will toll together = =5.67~5
In this example, we cannot round off to 6 as the bell have rang only 5 times, and they covered 67% of time for the next ring but couldn't complete it.
7:59am और 8:16am के बीच सेकंड = 1760=1020
लघुतम समापवर्त्य ( 3,6,9,12 और 15 ) = 180
एक साथ बजेगी = =5.67~5
