A fan rotates on its shaft around 5 times in a second. How many times does thefan rotate in a day if there was no electricity for 2 hours ?
a) 396000
b) 39600 c) 395000 d)398000
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Answer:
a) 396000
The fan rotates 3,96,000 times in a day (without electricity for 2hrs).
Step-by-step explanation:
No.of hours the fan rotates = 24 - 2 = 22hrs
22hrs in seconds = 22 × 3600 = 79,200sec
No.of times the fan rotates in a day without electricity for 2hrs
= 79,200 × 5
= 3,96,000
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