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  1. An interval of 3 hours 40 minutes is wrongly estimated as 3 hours 45.5 minutes. The error percentage is
    1. 5.5%
    2. 5.2%
    3. 5%
    4. 2.5%
Correct Option: D

Error = 5.5 minutes
∴ Error per cent

=
5.5
× 100 = 2.5 per cent
3 × 60 + 40


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