L) A schools open house begins
at 12:30 p.
and ended
after 3 hours 1p minutes at
what time did it end?
Answers
Answer:
I think so 3:30 ok plz add me as brainliest
Answer:
Explanation:
Speed of 1
st
clock =58min/hr
Speed of 2
nd
clock =61min/hr [Since it gains 2min in 2hrs, it should gain 1min in 1hr]
Relative velocity of 2
nd
clock wrt 1
st
=61−58=3min/hr
Relative distance travelled by the 2
nd
clock wrt 1
st
by the time both are stopped =1hr6min=66min
Time taken by the 2
nd
clock wrt 1
st
to cover 66min=66/3=22hours
In those 22 hours, mins covered by the 1
st
clock =22×58=1276
The actual mins elapsed in those 22hours=22×60=1320
∴ Number of mins the 1
st
clcok is behind the correct time=1320−1276=44mins
⇒ If the time on the 1
st
clock is 9am, then the correct time is 9:44amSpeed of 1
st
clock =58min/hr
Speed of 2
nd
clock =61min/hr [Since it gains 2min in 2hrs, it should gain 1min in 1hr]
Relative velocity of 2
nd
clock wrt 1
st
=61−58=3min/hr
Relative distance travelled by the 2
nd
clock wrt 1
st
by the time both are stopped =1hr6min=66min
Time taken by the 2
nd
clock wrt 1
st
to cover 66min=66/3=22hours
In those 22 hours, mins covered by the 1
st
clock =22×58=1276
The actual mins elapsed in those 22hours=22×60=1320
∴ Number of mins the 1
st
clcok is behind the correct time=1320−1276=44mins
⇒ If the time on the 1
st
clock is 9am, then the correct time is 9:44am