Question

15. A clock shows 8:05. Time correct to nearest hour is
nearest hour is​

Answer 1

Answer:

ANSWER

The answer is option D

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 9:44am