Question

The interest on rupees 3000 for one year is rupees 210 what is interest on rupees 4500 for a year if one want to get an interest of Rs 700 what should be the principal?

Answer 1

(210×100)/(3000×1)=7% rate of interest

Interest=(4500×7×1)/100=315

principal=(700×100)/(7×1)=10000

Answer 2

Rs. 315 as SI and Rs.10000 as principal.

Step-by-step explanation:

Since we have given that

Sum = Rs. 3000

S.I. = Rs. 210

Time = 1 year

So, it becomes,

$210=\dfrac{3000\times R\times 1}{100}\\\\\dfrac{210}{30}=R\\\\7\%=R$

If sum = Rs. 4500

Then, interest would

$SI=\dfrac{4500\times 7\times 1}{100}\\\\SI=315$

Now, interest = Rs. 700

So, it becomes,

$700=\dfrac{P\times 7\times 1}{100}\\\\100\times 100=P\\\\P=Rs.\ 10000$

Hence, Rs. 315 as SI and Rs.10000 as principal.

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The interest on rupees 3000 for one year is rupees 210 what is interest on rupees 4500 for a year if one want to get an interest of Rs 700 what should be the principal?

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