SOLUTION: find the sum of first 60 multiples of 48

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Question 473875: find the sum of first 60 multiples of 48
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
48 + 48*2 + 48*3 + 48*4 + ... + 48*60
= 48(1 + 2 + 3 + 4 + ... + 60) = 48%2A%2860%2F2%29%281%2B60%29+=+48%2A30%2A61+=+87840