Three bells ring similtaneously at 11:00 a.m. They ring at regular intervals of 20 mins, 30 mins, & 40 mins repectively. What is the time when all the three bells will ring to gether again
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2
Answer:
Hence, the bells will toll together age in after 2 hours i.e. at 1 pm
(A+B)′s1days work
=12.....(i)
(B+C)′s1 day′s work
=115....(ii)
∴Difference between AandC′s1 days work
=112−115=5−460=160
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Step-by-step explanation:
1 st bell rings every 20 min
2 nd bell rings every 30 min
3 rd bel rings every 40 min
lcm of 20, 30 ,40 is 120
all three bells ring at a time after 120 min from 11 a.m that is 1 : 00 p.m
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