Cotabato city national high school rojas extends community service by giving in kind donation to barangay's and front liners of the city. on the first week of the month of april the school shared a total of 20, 000 worth of in kinds to nearby barangays. if donations keep increasing every week by a thousand than the previous week, how much all in all were given away by the school in just 2 months?
Answers
Given : on the first week of the month of april the school shared a total of 20, 000 worth Donations
donations keep increasing every week by a thousand than the previous week
To Find : how much all in all were given away by the school in just 2 months
Solution:
Cases :
Considering 8 weeks in 2 months or 9 weeks in 2 months
Considering 8 weeks in 2 months
1st week a = 20,000
d = 1000
8th week = 20000 + (8 - 1) 1000 = 27000
Sum = (8/2)(20000 + 27000)
= 4(47000)
= 188,000 $
Considering 9 weeks in 2 months
1st week a = 20,000
d = 1000
9th week = 20000 + (9 - 1) 1000 = 28000
Sum = (9/2)(20000 + 28000)
= 9(24000)
= 216,000 $
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