The longitude of Allahabad, India is 81° 50' (81 degrees, 50 minutes) E. If the time in Allahabad is around 12 noon, what time of the day would it be, at a place whose longitude is 10°W?

6 AM

Step-by-step explanation:

The difference:

81°50' - (10° W) = 81°50' - (-10°)= 91° 50'

As we know each 15° represents 1 hr difference

91° 50' ÷ 15°= 6 in full number, so 6 hours difference

Since new point is towards West, the time difference would be negative:

12 PM - 6 hours = 6 AM

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square