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With standard meridian as 82 30' E the standard time at...

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With standard meridian as 82° 30' E the standard time at longitude 90° E is 8 h 30 m. The local mean time at the place will be

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Correct Answer: Option D
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Carry On
Carry On 1 year ago
Step 1
∆L=Local Longitude - Standard Longitude
∆L=90°E - 82° 30' E
∆L=7°30'.
Step 2
CONVERT MINUTES TO ARC TO DEGREE
30'=30/60=0.5°
∆L=7.5°
TIME DIFFERENCE
∆T=∆L × 4 minutes/ degree
∆T= 7.5° × 4 = 30 Minutes
Local mean time =8 h 30 m + 30 m
= 9 h 00 m.
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