AMC8 1985 Problem 19

Past Contests AMC8 AMC 8 - 1985
1

If the length and width of a rectangle are each increased by 10 \%, then the perimeter of the rectangle is increased by

Answer Choices
A. 1 \%
B. 10 \%
C. 20 \%
D. 21 \%
E. 40 \%