Answer: half year
Step-by-step explanation:
The formula to find the simple interest is given by :-
, , where P is the principal amount , r is the rate of interest and t is the time in year.
Given : I=420 ; r=14%=0.14 and P =$6000
Then, we have the following equation :-

It means the duration of the loan is half year .
8/10
4x2=8
5x2=10
this is how you know they are equal
Divide 235/5 so 47 check by doing 47 times 5 it checks so the answer is 47