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A clock strikes for every half an hour once and for every hour for the number same as that of the hour. What was the number of strikes given by the clock from 8 hours to 12 hours?

A.	45	B.	50
C.	55	D.	60

Answer and Explanation

Answer:55

Explanation:
For all half an hour once
Total strikes for half hour = 5
For hour from 8 to 12, number of strikes = 8 + 9 + 10 + 11 + 12 = 50

Total strikes = 5 + 50 = 55

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