Maths / Comparing Quantities / Simple Interest

QUESTION
 

In what time will Rs.72 become Rs.81 at 6frac{1}{4}p.a SI?

OPTIONS
A. 

1frac{1}{2}years

B. 

2frac{1}{2}years

C. 

2years

D. 

none of these

Right Option : C

EXPLANATION
Explain TypeExplanation Content
Text

Principle=Rs.72 Rate; of ;interest=6.25 Amount=Rs.81 Simple ;interest=Amount -Principle =81-72 =Rs.9 Simple;interest=frac{PRT}{100} 9=frac{72*6.25*T}{100} 9=frac{450T}{100} T=frac{9*100}{450} T=2years

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