A train runs late by an hour and 40 minutes and reaches the destination at 4:20 a.m. It should have been at the station at, if it weren't late.

2:40 a.m.

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3:40 a.m.

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6:00 a.m.

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1:40 a.m.

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Solution

The correct option is A 2:40 a.m.
The train reaches the destination at 4:20 a.m.
It ran late by an hour and 40 minutes.

$∴$ The train was supposed to have reached the station an hour and 40 minutes before 4:20 a.m.

1 hour and 40 minutes
=
1 hour + 20 minutes + 20 minutes

An hour before 4:20 a.m. is 3:20 a.m.

20 minutes before 3:20 a.m. is 3:00 a.m.

20 minutes before 3:00 a.m. is 02:40 a.m.

$∴$ The train should have reached at 2:40 a.m.

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