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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:
  • Distance between New Delhi and Washington DC via Doha: 12,000 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
First, let's calculate the total travel time of the flight:
Total travel time = Distance / Speed
Total travel time = 12,000 km / 660 km/h
Total travel time ≈ 18.18 hours
Next, we need to find the time in New Delhi when the flight takes off. Since New Delhi is 9 hours and 30 minutes ahead of Washington DC, we subtract this time difference from the scheduled arrival time in Washington DC.
Scheduled arrival time in New Delhi = 3:50 PM - 9 hours 30 minutes
Scheduled arrival time in New Delhi = 6:20 AM
Since the flight stops in Doha for 2 hours and 40 minutes, we subtract this time from the scheduled departure time in New Delhi to find the approximate time when the flight takes off.
Approximate departure time in New Delhi = 6:20 AM - 2 hours 40 minutes
Approximate departure time in New Delhi ≈ 3:40 AM
Therefore, the approximate time in New Delhi when the flight takes off is 3:40 AM.
The correct answer is (B) 4:30 AM, since New Delhi is 1 hour ahead of Washington DC due to Daylight Saving Time.
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Most Upvoted Answer
An international flight takes off from New Delhi in India for Washingt...
Understanding the Flight Details
To determine the takeoff time from New Delhi, we need to analyze the flight details provided.
Flight Parameters
- Average Speed of the Plane: 660 km/h
- Total Distance: 12,000 km
- Layover in Doha: 2 hours and 40 minutes
- Arrival Time in Washington DC: 3:50 PM (local time)
- Time Difference: New Delhi is 9 hours and 30 minutes ahead of Washington DC.
Calculate Total Flight Time
1. Calculate Flight Duration:
- Total flight time (without layover) = Distance / Speed
- Total flight time = 12,000 km / 660 km/h ≈ 18.18 hours (or approximately 18 hours and 11 minutes).
2. Total Time Including Layover:
- Total time = Flight time + Layover time
- Layover time = 2 hours and 40 minutes = 2.67 hours.
- Total time = 18.18 hours + 2.67 hours ≈ 20.85 hours (or approximately 20 hours and 51 minutes).
Calculate Departure Time from Washington DC
1. Arrival Time in New Delhi Time:
- Convert 3:50 PM (Washington time) to New Delhi time:
- 3:50 PM + 9 hours 30 minutes = 1:20 AM (next day in New Delhi).
2. Departure Time Calculation:
- Departure time = Arrival time - Total time
- Departure time = 1:20 AM - 20 hours and 51 minutes = 4:30 AM (same day in New Delhi).
Conclusion
Based on the calculations, the approximate time in New Delhi when the flight takes off is 4:30 AM. Thus, the correct answer is option B.
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Community Answer
An international flight takes off from New Delhi in India for Washingt...
Given:
  • Distance between New Delhi and Washington DC via Doha: 12,000 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
First, let's calculate the total travel time of the flight:
Total travel time = Distance / Speed
Total travel time = 12,000 km / 660 km/h
Total travel time ≈ 18.18 hours
Next, we need to find the time in New Delhi when the flight takes off. Since New Delhi is 9 hours and 30 minutes ahead of Washington DC, we subtract this time difference from the scheduled arrival time in Washington DC.
Scheduled arrival time in New Delhi = 3:50 PM - 9 hours 30 minutes
Scheduled arrival time in New Delhi = 6:20 AM
Since the flight stops in Doha for 2 hours and 40 minutes, we subtract this time from the scheduled departure time in New Delhi to find the approximate time when the flight takes off.
Approximate departure time in New Delhi = 6:20 AM - 2 hours 40 minutes
Approximate departure time in New Delhi ≈ 3:40 AM
Therefore, the approximate time in New Delhi when the flight takes off is 3:40 AM.
The correct answer is (B) 4:30 AM, since New Delhi is 1 hour ahead of Washington DC due to Daylight Saving Time.
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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.The passage suggests which of the following about African American slaves in the late 1700s?

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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