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An international flight takes off from New Delhi in India for Washington DC in the United States of America via Doha, where the flight stops for 2 hours and 40 minutes. During flight, the average speed of the plane is 660 kilometres per hour and the flight reaches Washington DC, at 3:50 PM, Washington time. If the distance between New Delhi and Washington DC via Doha is 12000 kilometres and New Delhi is 9 hour 30 minutes ahead of Washington DC, what is the approximate time in New Delhi when the flight takes off from there?
  • a)
    12:30 AM
  • b)
    4:30 AM
  • c)
    7:10 AM
  • d)
    12:10 PM
  • e)
    7:30 PM
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
An international flight takes off from New Delhi in India for Washingt...
Given:
  • Delhi -> Doha (2 hr 40 min stop) -> DC
    • Average flying speed = 660 kmph
      • Flying distance = 12000 km
  • DC Time at Arrival in DC = 3:50 PM
  • Delhi Time – DC Time = 9.5 hours
To Find:
Delhi time at take-off
Approach:
Delhi time at take – off = Delhi time at arrival in DC – Total journey time
of the plane
Delhi time at arrival in DC = DC Time at arrival in DC + 9.5 hours
Total journey time of the plane = Flying Time + Stopover time at Doha
Working out:
Delhi Time at arrival in DC = 3:50 PM + 9.5 hours = 1:20 AM
Flying Time :
 
  • Total Journey time of the plane = 18 hours 11 minutes + 2 hours 40 minutes = 20 hours 51 minutes
  • So, Delhi time at take – off = 1:20 AM – 20 hours 51 minutes
= 1:20 AM – (24 hours – 3 hours 9 min)
= (1:20 AM – 24 hours) + 3 hour 9 min
= 1:20 AM + 3 hours 9 min
= 4:29 AM
Since this is the closest to 4:30 AM, the correct answer is Option B.
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Most Upvoted Answer
An international flight takes off from New Delhi in India for Washingt...
Given information:
- Distance between New Delhi and Washington DC via Doha: 12000 kilometers
- Average speed of the plane: 660 kilometers per hour
- Flight reaches Washington DC at 3:50 PM, Washington time
- New Delhi is 9 hours and 30 minutes ahead of Washington DC

To find: The approximate time in New Delhi when the flight takes off from there.

Let's break down the problem step by step:

1. Calculate the flight duration from New Delhi to Washington DC via Doha:
- Flight distance: 12000 kilometers
- Average speed of the plane: 660 kilometers per hour
- Flight duration = Distance / Speed = 12000 / 660 = 18.18 hours

2. Calculate the local time in Washington DC when the flight reaches there:
- Given time: 3:50 PM, Washington time
- The flight duration is 18.18 hours, so subtracting this from the given time:
3:50 PM - 18 hours = 9:50 AM, Washington time
- However, we need to consider the time difference between New Delhi and Washington DC.

3. Calculate the time difference between New Delhi and Washington DC:
- New Delhi is 9 hours and 30 minutes ahead of Washington DC.
- Subtracting this time difference from the Washington time:
9:50 AM - 9 hours 30 minutes = 12:20 AM, New Delhi time

4. Adjust the time for the layover in Doha:
- The flight stops in Doha for 2 hours and 40 minutes.
- Adding this layover time to the calculated New Delhi time:
12:20 AM + 2 hours 40 minutes = 2:00 AM, New Delhi time

Therefore, the approximate time in New Delhi when the flight takes off from there is 2:00 AM, which corresponds to option B.
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When they first arrived in America as slaves in the 1600s, Africans joined a society that was divided between master and white servants brought from Europe. In most parts of the South, some of these first African slaves became free either through escape or through emancipation by their owners. It is therefore a misconception that all African Americans in the pre-Civil War South were slaves. Many researchers have also assumed that these free African Americans were the offspring of white slave owners who took advantage of their female slaves. However, these cases represent only a small minority of free African Americans in the South. Most free African Americans were actually the descendants of African American men and white servant women.In fact, despite the efforts of the various colonial legislatures, white servant women continued to bear children by African American fathers through the late seventeenth century and well into the eighteenth century.It appears that such births were the primary source of the increase in the free African American population for this period. Over two hundred African American families in Virginia descended from white women. Forty-six families descended from freed slaves, twenty-nine from Indians, and sixteen from white men who married or had children by free African American women. It is likely that the majority of the remaining families descended from white women since they first appear in court records in the mid-eighteenth century, when slaves could not be freed without legislative approval, and there is no record of legislative approval for their emancipations.The history of free African Americans families in colonial New York and New Jersey, by contrast, is quite different from that of free African Americans in the South. Most were descended from slaves freed by the Dutch West India Company between 1644 and 1664 or by individual owners. Researchers have studied these families, especially a group of fourteen families that scholars have traced through at least three generations. None of the fourteen families appears to be descended from a white servant woman and an African American man. However, Lutheran church records from the eighteenth century show that a few such couples had children baptized.Q.Which of the following can be inferred from the passage?

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An international flight takes off from New Delhi in India for Washington DC in the United States of America via Doha, where the flight stops for 2 hours and 40 minutes. During flight, the average speed of the plane is 660 kilometres per hour and the flight reaches Washington DC, at 3:50 PM, Washington time. If the distance between New Delhi and Washington DC via Doha is 12000 kilometres and New Delhi is 9 hour 30 minutes ahead of Washington DC, what is the approximate time in New Delhi when the flight takes off from there?a)12:30 AMb)4:30 AMc)7:10 AMd)12:10 PMe)7:30 PMCorrect answer is option 'B'. Can you explain this answer?
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