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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Chashokreddy18@gmail.com posted an Question
April 04, 2020 • 22:02 pm
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30 points
30 points
- CSIR NET
- Mathematical Sciences
In this problem, for required no.of times,which formula is used?
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Ujjawal vishal Best Answer
in question there should be 30 hrs instead of 30 minutes. Now, with the LCM technique we know that rings bell simultaneously (together) after every interval of 2 hours. That means in every 2hrs, they ring together. Hence, in 30 hrs no. of times they ring = 30/2= 15 (simple unitary method) Since, at t=0 (initial time) they rang together. So, adding it to 15, we get total 15+1= 16 Here, there is no need of any formula...