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17 vote

The bus for Chennai leaves every 30 minutes from a bus depot. The enquiry clerk told a passenger that the bus for Chennai left 10 minutes ago, and the next bus will leave at 10.30 a.m. What was the time when enquiry clerk told this ?

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The bus for Chennai leaves every 30 minutes from a bus depot. The enquiry clerk told a passenger that the bus for Chennai left 10 minutes ago, and the next bus will leave at 10.30 a.m. What was the time when enquiry clerk told this ?
1). 10.20 a.m.
2). 10.10 a.m.
3). 10 a.m.
4). 9.50 a.m.


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2 answers

3 vote
Answered by on | Votes 3 |

10:10 AM

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14 vote
Answered by on | Votes 14 |
Next bus is at $10:30$ a.m.  And the bus for Chennai leaves every $30$ minutes.
So last bus has left $30$ minutes before $10: 30$ a.m. $=> 10:00$ a.m
When the passenger enquired, the clerk answer the bus left $10$ minutes ago.
Enquiry time $= 10:00 a.m + 10 min = 10: 10 a.m    $  
Accepted Answer