Three bells rings at the intervals of 36 seconds, 40 seconds and 48 seconds respectively. they start ringing together at a particular time. when they will start ringing together again? (1)after 6 minutes (2) after 12 minutes (3)after 18 minutes (4) after 24 minutes
Answers
Answered by
10
HEYA FRIENDS
Please ignore the image, It's wrong..
The bell will ring together after 12 minutes.
SOLUTION::
Take L.C.M of all..
36 = 2^2×3^2
40 = 2^3×5
48 = 2^4×3
l.c.m = 2^5×3^2×5
=720 seconds.
1 seconds = 1/60 minutes
720 seconds = 720/60min.
=12 min.
☺☺ HOPE IT HELPS YOU.......☺
Please ignore the image, It's wrong..
The bell will ring together after 12 minutes.
SOLUTION::
Take L.C.M of all..
36 = 2^2×3^2
40 = 2^3×5
48 = 2^4×3
l.c.m = 2^5×3^2×5
=720 seconds.
1 seconds = 1/60 minutes
720 seconds = 720/60min.
=12 min.
☺☺ HOPE IT HELPS YOU.......☺
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kushanaanandp4ac8a:
How is 2^5 possible in the LCM
sorry its 2^4
Answered by
3
your answer is (2) after 12 minutes
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