Hello, thank you for taking the time to post your question!
I would start by setting up a general equation here based on the information given
R + 2R = 162, where R is the number of points Rachana scored and 2R is the number of points Arelene scored since it was double the amount of points of Rachana
Solving that equation for “R” I get
3R = 162
R = 54 , so Rachana scored 54 points.
Then 54 x 2 = 108, meaning that Arlene scored 108 points
I hope that helps get you moving in the right direction! Feel free to reach out if you have any additional questions beyond that :)