Answer: Interest saved by paying the loan after two years instead paying it after 4 years is $2,000.
Explanation:
Simple interest, when time taken of 4 years
Principal amount borrowed from bank as a loan, P = $ 20,000
Interest Rate ,R = 5%
Time taken to repay the loan , T = 4 years

Simple interest ,when time taken of 2 years
Principal amount borrowed from bank as a loan, P = $ 20,000
Interest Rate ,R = 5%
Time taken to repay the loan = 2 years

Interest saved by paying the loan off sooner that is in 2 years:
=Simple interest paid in 4 years - Simple interest paid in 2 years.
= $4,000 - $2,000 = $2,000