Maths / Comparing Quantities / Simple Interest

QUESTION
 

A sum of money at simple interest amounts to Rs. 840 in 2 yr and 920 in 4 yr. The sum is ________________________

OPTIONS
A. 

Rs. 700

B. 

Rs. 640

C. 

Rs. 760

D. 

Rs. 820

Right Option : C

EXPLANATION
Explain TypeExplanation Content
Text

Amount after 2 yr = Rs. 840

Amount of 4 yr = Rs. 920

therefore       SI for 2: : yr =Rs.920-Rs.840=Rs.80

So, SI for 4 yr = Rs. 160

therefore   Principal amount  =Rs(920-160)=Rs.760

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