I dont know that either i am actually trying to figure that out now
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One pair is 4.345+4.345 (which is the pair that does not involve grouping)
Answer:
19 seconds.
Step-by-step explanation:
Given that the clock was exactly on time at 7am, and at 1pm the clock was 228 seconds late, to determine, at that rate, how slow was the clock half an hour, the following calculation must be performed:
1 PM = 13:00
13 - 7 = 6
228/6 = 38
38/2 = 19
Thus, every half hour the clock is delayed 19 seconds.
There are 360 degrees so divide 360 by 20 and get 18 degrees