Aptitude - Simple Interest - Discussion

Answer is 115......
SI for 1st year:(200*5)/100=10 (Now this is Interest)
He paid 100/- after 1st year
Now, new Principal becomes:100/-
Interest on 100:(100*5)/100=5
So he has to pay:100+10+5=115

Answer is absolutely correct. Just know about what is simple interest and compound interest.

Hey guys,

The answer is correct, because in simple interest the calculation is always done on the main amount not on the addition of interest and main.

After first year amount=210, where 10 is intrest.
since 100 is already paid so rest amount is 200+10-100=100+10.

Since 10 is the interest of first year so we cannot include that amount for calculating the rest money of 2nd year.

Now SI for next year = 100*5*1/100=5

Hence the total amount = main amount + SI of 1st year + SI of 2nd year
= 100+10+5 = 115.

The given answer is correct , coz he left with 100/- plus the interest plus the interest of that 100/- which is due..
100+10+(100*5*1/100) = 115

Statement is wrong. It should be stated that the Rs. 100 is paid back from the pricipal.

Then answer is 115. Otherwise ans is 115. 50.

I agree with bindu explanation.

For 1 year...

si=200*5*1/100=10 rs

Now lets say simple interest will be paid after 2nd yr...

So after he paid 100 rs ..

For next yr si will be calculated on (200-100)=100

si=100*5*1/100=5

So total amount should be paid after 2nd yr=100+5+10=115

Ans is 115 when it is SI and 115.5 when it is CI

p=200 initially

r=5%

So si for first year =200*1*5/100=10 rs

He returns rs 100 ie 200-100=100

So for the first year after paying 100 rs balance will be 100 rs principle and 10 rs interest .as it is si next year interest will be calculated for rs 100 which is
The balance in his loan
2nd year si=100*1*5/100=5 rs

So at the end of 2nd year to close the loan he has to pay rs 100(principle balance) +rs 10(interest 1st yr) +rs 5(interest 2nd year)=115 rs

If it was CI answer will be 115.5 as 2nd years p will be 100+10
hope the confusion is over now :)

115 is correct

because logically thinking the power of simple interest is one must not calculate interest for the previous interest money and so no one will return the interest before returning the complete principle so 115 is correct

The answer is 115.50, correct it NOW