GAUSS8 2017 Problem 13

Past Contests GAUSS8 GAUSS (GR. 8) - 2017
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1

The sum of the first 100 positive integers (that is, 1+2+3+\cdots+99+100) equals 5050. The sum of the first 100 positive multiples of 10 (that is, 10+20+30+\cdots+990+1000) equals

Answer Choices
A. 10\:100
B. 5950
C. 50\:500
D. 6050
E. 45\:450