rs 800amounts to 920in 3 years at simple interest if the..., Simple Interest, General Mathematics

Question:Rs. `800`amounts to Rs. `920`in `3` years at simple interest.If the interest rate is increased by `3%`,it would amount to how much ?

A `Rs. 992` 
B `Rs. 1056` 
C `Rs. 1112` 
D `Rs. 1182`

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+ AnswerA

+ ExplanationPrincipal = Rs. 800, S.I 

`= Rs. 120, Time = 3 years`

`Rate = ((100 xx 120)/(800 xx 3))%`

`= 5%`.

New rate` = 8%`, principal

`= Rs. 800, Time = 3 years`.

`S.I = Rs. ((800 xx 8 xx 3)/(100))`

`= Rs. 192`

 :. New amount 

`= Rs. (800 + 192)`

`= Rs. 992`

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