Answer:
m = 13.5
Step-by-step explanation:
The perimeter of a parallelogram is calculated by using the following formula:
P = 2(a+b) (a: base, b: side)
Here, the base and side are represented with m and 3m.
2(m+3m) = 102 first find the sum of side and base then multiply it by 2
2*4m = 102 multiply
8m = 102 divide both sides by 8
m = 13.5
