1.

Shiva switched on a bulb at 1 ∶ 37 ∶ 39 hours and switched it off on the same day at 11 ∶ 28 ∶ 32 hours. For how long was the bulb in switched-on mode?

A. 10 hours 09 mins 54 secs
B. 9 hours 09 mins 06 secs
C. 9 hours 50 mins 53 secs
D. 12 hours 40 mins 07 secs
Answer» D. 12 hours 40 mins 07 secs


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